Special Purpose Examination (SPEX) — Questions and Answers

Question 1: Which beta-blocker is considered cardioselective at low doses and preferred in patients with mild asthma?

Carvedilol
Labetalol
Metoprolol (Correct answer)
Propranolol

Correct answer: Metoprolol

Metoprolol is a beta-1 selective blocker that, at low doses, has less bronchospastic risk compared to non-selective beta-blockers.

Question 2: A 45-year-old man presents with 6 months of persistent worry about multiple life domains that he cannot control, accompanied by muscle tension, fatigue, and poor sleep. The most appropriate diagnosis is:

Adjustment disorder with anxious mood
Generalized anxiety disorder (Correct answer)
Panic disorder
Social anxiety disorder

Correct answer: Generalized anxiety disorder

GAD requires at least 6 months of excessive, uncontrollable worry about multiple topics with associated physical symptoms such as muscle tension and fatigue.

Question 3: Which pharmacokinetic property of digoxin makes renal dosage adjustment uniquely critical compared to most other cardiac glycosides?

Digoxin is primarily eliminated unchanged by glomerular filtration and tubular secretion (Correct answer)
Digoxin is highly protein-bound, so hypoalbuminemia dramatically increases free drug levels
Digoxin undergoes extensive first-pass hepatic metabolism to inactive glucuronides
Digoxin has a narrow volume of distribution, making dialysis highly effective for toxicity

Correct answer: Digoxin is primarily eliminated unchanged by glomerular filtration and tubular secretion

Unlike many drugs, digoxin is eliminated predominantly (60–80%) as unchanged drug via renal excretion — through both glomerular filtration and active tubular secretion by P-glycoprotein. It is NOT significantly metabolized hepatically, undergoes minimal first-pass effect, has a very large volume of distribution (Vd ~7 L/kg), and is only ~25% protein-bound. This means renal impairment directly and proportionally reduces clearance, and dialysis is largely ineffective due to its enormous Vd.

Question 4: A 6-month-old presents with episodes of sudden flexion of the trunk and extremities lasting seconds, occurring in clusters. EEG shows hypsarrhythmia. What is the diagnosis?

Infantile spasms (West syndrome) (Correct answer)
Juvenile myoclonic epilepsy
Febrile seizures
Absence seizures

Correct answer: Infantile spasms (West syndrome)

West syndrome (infantile spasms) presents in the first year of life with spasm clusters and hypsarrhythmia on EEG, often signaling underlying brain pathology.

Question 5: A woman at 10 weeks gestation is found to have a TSH of 0.05 mIU/L and elevated free T4. She has no symptoms. What is the most appropriate next step?

Reassure and repeat labs in 4 weeks (Correct answer)
Perform thyroid ultrasound and refer to endocrinology
Start methimazole immediately
Start propylthiouracil (PTU)

Correct answer: Reassure and repeat labs in 4 weeks

Gestational hyperthyroidism from hCG stimulation is common in the first trimester and typically resolves spontaneously; reassurance and follow-up is appropriate for asymptomatic cases.

Question 6: Nitroglycerin sublingual tablets should be stored in which type of container?

Refrigerated blister pack
Original manufacturer glass bottle, tightly closed (Correct answer)
Any airtight plastic container
Amber plastic bottle with child-resistant cap

Correct answer: Original manufacturer glass bottle, tightly closed

Nitroglycerin sublingual tablets are highly volatile and must be stored in their original tightly closed glass container to prevent loss of potency.

Question 7: A trainee appraiser argues that passing the SPEX should waive the supervisory appraiser requirement and allow her to complete appraisals independently while awaiting full licensure. Under AQB criteria, this argument is:

Valid only if the trainee's home state has enacted an AQB-compliant provisional license statute that references the SPEX.
Invalid, because the SPEX addresses education equivalency for reciprocal licensure only and has no bearing on trainee supervision requirements. (Correct answer)
Partially valid — the SPEX waives the supervisor requirement for desktop appraisals but not for in-person inspections.
Valid, because the SPEX demonstrates sufficient educational competency to perform appraisals without supervision on non-complex residential assignments.

Correct answer: Invalid, because the SPEX addresses education equivalency for reciprocal licensure only and has no bearing on trainee supervision requirements.

The SPEX is an examination pathway designed exclusively for reciprocal licensure — specifically to allow an appraiser already credentialed in one state to waive re-taking education hours in another state. It has no applicability to trainee supervision requirements, which are governed by separate AQB experience criteria and state regulations. A trainee cannot use the SPEX to circumvent the supervised experience requirement.

Question 8: Which finding on fetal umbilical artery Doppler is most concerning for fetal compromise?

Systolic-to-diastolic ratio of 3
Pulsatility index at the 75th percentile
Absent end-diastolic flow (Correct answer)
Normal waveform with mild resistance

Correct answer: Absent end-diastolic flow

Absent or reversed end-diastolic flow on umbilical artery Doppler indicates severely increased placental vascular resistance and is associated with significant fetal compromise.

Question 9: Which pharmacokinetic parameter, when doubled, will produce the greatest reduction in peak plasma concentration (Cmax) for a drug given as a single IV bolus dose?

Volume of distribution (Vd) (Correct answer)
Renal clearance (CLr)
Elimination half-life (t½)
Protein binding fraction

Correct answer: Volume of distribution (Vd)

For an IV bolus, Cmax = Dose / Vd. Doubling Vd directly halves Cmax because the drug distributes into a larger apparent space immediately after administration. Elimination half-life affects how long drug remains in plasma but does not affect the initial Cmax after an IV bolus. Protein binding changes free drug fraction but total plasma concentration (which Cmax measures) is determined by Vd. Renal clearance affects elimination rate and AUC, not the initial peak after a single bolus.

Question 10: A 40-year-old presents with episodic severe unilateral periorbital pain lasting 30–90 minutes, associated with ipsilateral lacrimation and rhinorrhea, occurring in clusters. What is the diagnosis?

Cluster headache (Correct answer)
Giant cell arteritis
Migraine with aura
Trigeminal neuralgia

Correct answer: Cluster headache

Cluster headaches are severe unilateral periorbital headaches with autonomic features (lacrimation, rhinorrhea, ptosis) occurring in temporal clusters.

Question 11: In SPEX practice, what is the best approach to quality improvement in obstetrics and gynecology?

Make changes without measuring results
Wait for problems to occur before acting
Use data-driven methods with measurable outcomes (Correct answer)
Copy what other organizations do without analysis

Correct answer: Use data-driven methods with measurable outcomes

Data-driven quality improvement with measurable outcomes ensures that changes actually produce the intended improvements and can be verified.

Question 12: A 72-year-old develops progressive cognitive decline, gait disturbance, and urinary incontinence. MRI shows enlarged ventricles without cortical atrophy. What is the likely diagnosis?

Creutzfeldt-Jakob disease
Vascular dementia
Normal pressure hydrocephalus (Correct answer)
Alzheimer's disease

Correct answer: Normal pressure hydrocephalus

Normal pressure hydrocephalus (NPH) presents with the classic triad of dementia, gait apraxia (magnetic gait), and urinary incontinence with ventriculomegaly on imaging.

Question 13: A 34-year-old woman at 28 weeks gestation presents with severe headache, visual disturbances, and BP of 158/106 mmHg. Labs show platelets 89,000/μL, AST 210 U/L, ALT 198 U/L, and LDH 780 U/L. Urinalysis reveals 3+ protein. Which of the following best describes the MOST appropriate next step in management?

Administer magnesium sulfate and antihypertensives, then expectantly manage until 34 weeks with close monitoring
Administer corticosteroids alone and reassess in 48 hours before deciding on delivery
Initiate immediate cesarean delivery without delay for corticosteroid administration
Administer magnesium sulfate and corticosteroids, then plan delivery within 24–48 hours regardless of fetal lung maturity (Correct answer)

Correct answer: Administer magnesium sulfate and corticosteroids, then plan delivery within 24–48 hours regardless of fetal lung maturity

This patient has HELLP syndrome (hemolysis, elevated liver enzymes, low platelets) superimposed on severe-feature preeclampsia at 28 weeks. HELLP syndrome is an obstetric emergency. The correct approach is to stabilize the mother with magnesium sulfate (seizure prophylaxis) and antihypertensives, administer corticosteroids for fetal lung maturity, and plan delivery within 24–48 hours. Unlike isolated preterm preeclampsia without severe features, HELLP syndrome does not permit prolonged expectant management due to rapid maternal deterioration risk (DIC, hepatic rupture, placental abruption).

Question 14: A trauma patient arrives with a stab wound to zone II of the neck with an expanding hematoma. Which is the most appropriate management?

Immediate intubation and ICU admission
CT angiography of the neck and selective operative management
Observation with serial physical exams
Mandatory operative exploration (Correct answer)

Correct answer: Mandatory operative exploration

An expanding hematoma in zone II neck trauma is a hard sign of vascular injury requiring immediate mandatory operative exploration without delay for imaging.

Question 15: What role does collaboration play in surgery for SPEX professionals?

It slows down work unnecessarily
It is only needed in emergencies
It enhances outcomes through diverse perspectives and shared expertise (Correct answer)
It reduces individual accountability

Correct answer: It enhances outcomes through diverse perspectives and shared expertise

Collaboration leverages diverse perspectives and combined expertise to achieve better outcomes than any individual could alone.

Question 16: The malar 'butterfly' rash that spares the nasolabial folds and worsens with sun exposure is most characteristic of which condition?

Seborrheic dermatitis
Systemic lupus erythematosus (SLE) (Correct answer)
Dermatomyositis
Rosacea

Correct answer: Systemic lupus erythematosus (SLE)

The malar butterfly rash of SLE is photosensitive, involves the cheeks and nasal bridge while sparing the nasolabial folds, and is one of the 11 ACR classification criteria for SLE.

Question 17: A 52-year-old man with a 20-year history of alcohol use disorder undergoes medically supervised detoxification. On day 3, he develops confusion, nystagmus, and ataxia. He is given thiamine 100 mg IV and admitted. On day 5, despite thiamine repletion, he is still confused but the ocular findings have resolved. His family reports he can hold a conversation but cannot recall what he had for breakfast. He confabulates when asked about recent events. Which neuroanatomical structures are MOST likely damaged?

Cerebellum and cranial nerve VI nuclei
Dorsomedial thalamus and mammillary bodies (Correct answer)
Prefrontal cortex and basal ganglia
Hippocampus and entorhinal cortex bilaterally

Correct answer: Dorsomedial thalamus and mammillary bodies

This presentation describes the transition from Wernicke encephalopathy (confusion, nystagmus, ataxia — the classic triad) to Korsakoff syndrome (anterograde amnesia with confabulation, relative preservation of procedural memory and consciousness). Korsakoff syndrome results specifically from thiamine-deficiency damage to the dorsomedial thalamus and mammillary bodies. The hippocampus is primarily involved in other amnestic syndromes (e.g., herpes encephalitis, anoxia). The cerebellum/CN VI are affected in Wernicke's acute phase but do not account for the amnestic syndrome.

Question 18: A 70-year-old farmer has a rough, scaly lesion on sun-damaged skin of his forehead. Biopsy reveals atypical keratinocytes confined to the epidermis. What is this lesion?

Actinic keratosis (Correct answer)
Keratoacanthoma
Seborrheic keratosis
Bowen's disease (SCC in situ)

Correct answer: Actinic keratosis

Actinic keratosis is a premalignant lesion on sun-damaged skin showing atypical keratinocytes in the lower epidermis without full-thickness involvement.

Question 19: A 30-year-old woman has butterfly-shaped erythema across her cheeks and nose. ANA is positive. Which skin finding would be most specific for systemic lupus erythematosus?

Malar rash sparing the nasolabial folds (Correct answer)
Erythema nodosum
Heliotrope rash
Gottron's papules

Correct answer: Malar rash sparing the nasolabial folds

The malar rash of SLE classically spares the nasolabial folds, distinguishing it from rosacea and seborrheic dermatitis.

Question 20: A radiologist is evaluating a hepatic lesion on a multiphasic contrast-enhanced CT. The lesion shows arterial phase hyperenhancement followed by washout appearance and a capsule on portal venous phase. However, it also demonstrates marked T2 hypointensity on MRI. Which diagnosis is MOST likely given this combination of findings?

Hepatocellular carcinoma (HCC) with hemorrhagic degeneration
Sclerosed hemangioma with progressive fibrous replacement (Correct answer)
Combined hepatocellular-cholangiocarcinoma (cHCC-CCA)
Hypervascular metastasis from a neuroendocrine tumor

Correct answer: Sclerosed hemangioma with progressive fibrous replacement

Sclerosed (or sclerosing) hemangiomas are a diagnostic pitfall because they can mimic HCC by showing arterial hyperenhancement and apparent washout on CT. However, the key distinguishing feature is marked T2 hypointensity on MRI — classic hemangiomas are T2 hyperintense ('light bulb bright'), but sclerosed hemangiomas exhibit T2 hypointensity due to progressive fibrosis replacing the vascular spaces. This combination — arterial enhancement, CT washout appearance, and profound T2 hypointensity — should raise suspicion for a sclerosed hemangioma rather than HCC, particularly in non-cirrhotic patients.

Question 21: A psychiatrist evaluates a patient who tells her that a neighbor is 'controlling his mind through the walls.' The neighbor is real, but the belief is fixed and false. This is best described as:

An overvalued idea
A delusion of control (thought insertion/passivity) (Correct answer)
A delusion of reference
An auditory hallucination

Correct answer: A delusion of control (thought insertion/passivity)

A fixed false belief that an external agent is controlling one's thoughts or actions is a delusion of control, also called a passivity experience.

Question 22: Which statement correctly describes the Vmax in Michaelis-Menten enzyme kinetics as applied to drug metabolism?

It is the maximum rate of metabolism achieved when all enzyme active sites are saturated (Correct answer)
It represents the affinity of the drug for the metabolizing enzyme
It decreases as drug concentration increases
It is the drug concentration at which reaction rate is half-maximal

Correct answer: It is the maximum rate of metabolism achieved when all enzyme active sites are saturated

Vmax is the theoretical maximum metabolic rate reached when all available enzyme molecules are fully occupied with substrate, making it independent of further drug concentration increases.

Question 23: A 38-year-old HIV-positive woman on suppressive antiretroviral therapy (CD4 count 620 cells/µL, undetectable viral load) presents for preconception counseling. Regarding live attenuated vaccines, which of the following is the MOST appropriate recommendation?

Zoster recombinant subunit vaccine (RZV) is contraindicated; use live zoster vaccine instead
All live vaccines are absolutely contraindicated regardless of CD4 count in HIV-positive patients
MMR and varicella vaccines are recommended if seronegative, as her CD4 count exceeds 200 cells/µL (Correct answer)
Live attenuated influenza vaccine (LAIV) is preferred over inactivated influenza for superior mucosal immunity

Correct answer: MMR and varicella vaccines are recommended if seronegative, as her CD4 count exceeds 200 cells/µL

Current ACIP and CDC guidelines recommend MMR and varicella vaccines for HIV-positive adults with CD4 ≥200 cells/µL who lack immunity, as the risk of the actual disease outweighs the attenuated vaccine risk at this immunocompetence threshold. LAIV is contraindicated in immunocompromised patients — inactivated influenza is used instead. RZV (Shingrix) is actually the preferred zoster vaccine for HIV-positive adults, not the live zoster vaccine (Zostavax), which is contraindicated when CD4 <200. Her CD4 of 620 and suppressed viremia make her a candidate for MMR and varicella if non-immune.

Question 24: What role does collaboration play in family medicine for SPEX professionals?

It is only needed in emergencies
It reduces individual accountability
It enhances outcomes through diverse perspectives and shared expertise (Correct answer)
It slows down work unnecessarily

Correct answer: It enhances outcomes through diverse perspectives and shared expertise

Collaboration leverages diverse perspectives and combined expertise to achieve better outcomes than any individual could alone.

Question 25: A 29-year-old G2P1 presents at 16 weeks with a cervical length of 18 mm on transvaginal ultrasound and a history of spontaneous preterm birth at 23 weeks in her prior pregnancy. She has no uterine contractions and cervical os appears closed on digital exam. Which intervention has the strongest evidence for reducing recurrent preterm birth in this specific clinical scenario?

Vaginal progesterone supplementation
Cervical pessary placement
Cervical cerclage placement (Correct answer)
Intramuscular 17-hydroxyprogesterone caproate weekly

Correct answer: Cervical cerclage placement

In a patient with a prior spontaneous preterm birth AND a short cervix (≤25 mm) on second-trimester ultrasound, history-indicated or ultrasound-indicated cerclage has the strongest evidence. ACOG supports cerclage in this singleton pregnancy scenario with both risk factors present. Vaginal progesterone is indicated for short cervix without prior PTB history. IM 17-OHPC is indicated for prior PTB without necessarily addressing concurrent short cervix—evidence for its use weakened after the PROLONG trial. Pessary lacks sufficient evidence in singleton gestations in U.S. guidelines.

Question 26: What is the cornerstone of management for Stevens-Johnson syndrome (SJS)?

Intravenous immunoglobulin (IVIG) alone
Supportive care in a burn unit or ICU (Correct answer)
High-dose systemic corticosteroids
Broad-spectrum antibiotics targeting S. aureus

Correct answer: Supportive care in a burn unit or ICU

The cornerstone of SJS management is supportive care—fluid replacement, wound care, nutritional support, and pain management—ideally in a burn unit due to the extent of epidermal detachment.

Question 27: Which feature distinguishes a melanoma from a benign melanocytic nevus using the ABCDE criteria?

Diameter less than 6 mm
Uniform tan color
Symmetric shape
Border irregularity (Correct answer)

Correct answer: Border irregularity

Border irregularity (notched, scalloped, or ill-defined edges) is a key ABCDE criterion distinguishing melanoma from benign nevi.

Question 28: Which of the following is characteristic of a lower motor neuron (LMN) lesion?

Babinski sign
Fasciculations (Correct answer)
Hyperreflexia
Spasticity

Correct answer: Fasciculations

LMN lesions cause flaccid paralysis, hyporeflexia, atrophy, and fasciculations.

Question 29: A 34-year-old woman with known epilepsy presents in status epilepticus. She received lorazepam 4 mg IV twice without effect. Levetiracetam 60 mg/kg IV was then administered with no cessation of seizure activity at 20 minutes. Which agent represents the MOST appropriate next step in refractory status epilepticus management per current guidelines?

Phenytoin 20 mg/kg IV at 50 mg/min
Valproic acid 40 mg/kg IV over 10 minutes (Correct answer)
Repeat lorazepam 4 mg IV and prepare for intubation
Lacosamide 400 mg IV over 15 minutes

Correct answer: Valproic acid 40 mg/kg IV over 10 minutes

Per the Neurocritical Care Society guidelines, after failure of benzodiazepines AND one second-line agent (levetiracetam in this case), the next step for refractory status epilepticus is a third agent. Valproic acid 40 mg/kg IV is a well-supported second-line/third-line option that is rapidly effective. Phenytoin at 50 mg/min risks cardiac arrhythmia and hypotension (fosphenytoin is preferred but not listed). Lacosamide lacks robust evidence in this setting. Repeating benzodiazepines at this stage is not guideline-concordant after two failed doses.

Question 30: A 72-year-old man with a history of hypertension develops sudden onset of ipsilateral Horner syndrome, contralateral loss of pain and temperature below the neck, ipsilateral limb ataxia, dysphagia, and hoarseness, with intact motor strength and position sense. Which artery occlusion is responsible, and what is the eponymous name of this syndrome?

Superior cerebellar artery (SCA); superior cerebellar syndrome
Anterior inferior cerebellar artery (AICA); lateral pontine syndrome
Basilar artery perforators; locked-in syndrome
Posterior inferior cerebellar artery (PICA); Wallenberg syndrome (Correct answer)

Correct answer: Posterior inferior cerebellar artery (PICA); Wallenberg syndrome

Wallenberg syndrome (lateral medullary syndrome) results from occlusion of the posterior inferior cerebellar artery (PICA) or the vertebral artery. It produces the characteristic crossed sensory pattern: ipsilateral face and contralateral body loss of pain/temperature (due to trigeminal nucleus and spinothalamic tract involvement respectively), ipsilateral Horner syndrome (descending sympathetics), ipsilateral cerebellar signs (inferior cerebellar peduncle), and bulbar symptoms (nucleus ambiguus). Motor strength and dorsal column sensation are preserved.

Question 31: Which histological finding is considered the hallmark of psoriasis?

Spongiosis with eosinophilic infiltrate
Caseating granulomas in the dermis
Regular acanthosis with elongated rete ridges and parakeratosis (Correct answer)
Subepidermal blistering with linear IgG deposits

Correct answer: Regular acanthosis with elongated rete ridges and parakeratosis

Psoriasis is characterized histologically by regular acanthosis, elongation of rete ridges, parakeratosis, and Munro microabscesses due to keratinocyte hyperproliferation.

Question 32: A 30-year-old woman presents with episodic unilateral headache, nausea, photophobia, and phonophobia lasting 6 hours. What is the diagnosis?

Trigeminal neuralgia
Migraine without aura (Correct answer)
Tension-type headache
Cluster headache

Correct answer: Migraine without aura

Migraine without aura is characterized by unilateral throbbing headache with nausea, photophobia, and phonophobia lasting 4–72 hours.

Question 33: A patient with a pontine lesion presents with ipsilateral facial weakness and contralateral hemiplegia. What is this pattern called?

Locked-in syndrome
Millard-Gubler syndrome (Correct answer)
Wallenberg syndrome
Weber syndrome

Correct answer: Millard-Gubler syndrome

Millard-Gubler syndrome results from a ventral pontine lesion causing ipsilateral CN VI/VII palsies and contralateral hemiplegia.

Question 34: A 28-year-old man with schizophrenia develops muscle rigidity, hyperthermia (41°C), diaphoresis, and altered consciousness after starting haloperidol. Labs show elevated CPK. What is the diagnosis?

Serotonin syndrome
Anticholinergic toxicity
Malignant hyperthermia
Neuroleptic malignant syndrome (Correct answer)

Correct answer: Neuroleptic malignant syndrome

Neuroleptic malignant syndrome presents with the tetrad of hyperthermia, rigidity, autonomic instability, and altered consciousness, with elevated CPK, following antipsychotic exposure.

Question 35: A newborn has vesicles grouped in a dermatomal pattern on the trunk. Tzanck smear shows multinucleated giant cells. What is the most appropriate treatment?

Oral valacyclovir
Observation only
Topical acyclovir cream
IV acyclovir (Correct answer)

Correct answer: IV acyclovir

Neonatal herpes simplex virus infection is a medical emergency requiring immediate IV acyclovir due to the risk of dissemination and mortality.

Question 36: When counseling a patient about a new inhaled corticosteroid (ICS) for asthma, which adverse effect should be specifically mentioned and mitigated?

Systemic corticosteroid effects like osteoporosis from a single inhaler
Irreversible adrenal suppression after the first month of use
Oral candidiasis, prevented by rinsing the mouth after each use (Correct answer)
Bronchoconstriction requiring a rescue inhaler before each dose

Correct answer: Oral candidiasis, prevented by rinsing the mouth after each use

Inhaled corticosteroids can cause oral candidiasis (thrush) due to oropharyngeal deposition; rinsing and spitting after use effectively prevents this.

Question 37: A radiologist reviews a bone scan in a patient with prostate cancer showing a 'superscan' pattern. Which of the following additional findings on the same study would MOST strongly support a superscan rather than a technical artifact or metabolic bone disease?

Absent renal activity with faint bladder activity (Correct answer)
Diffusely increased uptake in the calvarium
Symmetric uptake in the axial and proximal appendicular skeleton
Prominent uptake in the costochondral junctions

Correct answer: Absent renal activity with faint bladder activity

A superscan in metastatic prostate cancer is characterized by diffusely intense skeletal uptake that causes absent or markedly diminished renal and soft tissue activity — because nearly all injected tracer is taken up by the skeleton, leaving little to be excreted renally. Absent renal visualization with faint or absent bladder activity is the most specific ancillary sign confirming a true superscan. Symmetric axial uptake, calvarial uptake, and costochondral junction activity can be seen in metabolic bone disease (e.g., renal osteodystrophy) without representing a malignant superscan.

Question 38: A patient at 26 weeks is diagnosed with a cervical length of 1.8 cm on transvaginal ultrasound and has a prior preterm birth. Which intervention has the strongest evidence for reducing recurrent preterm birth?

Activity restriction
Oral progesterone
Cerclage placement
Vaginal progesterone (Correct answer)

Correct answer: Vaginal progesterone

Vaginal progesterone is recommended for asymptomatic women with a short cervix (≤25 mm) on ultrasound to reduce the risk of preterm birth.

Question 39: A 72-year-old man with COPD is brought in for acute respiratory failure. ABG on room air: pH 7.18, PaCO2 88 mmHg, PaO2 48 mmHg, HCO3 32 mEq/L. He is placed on BiPAP. After 90 minutes his SpO2 is 94% but he remains somnolent with a pH of 7.21 and PaCO2 of 82 mmHg. What is the most appropriate next step?

Administer IV doxapram as a respiratory stimulant to avoid intubation
Add helium-oxygen (heliox) mixture to the BiPAP circuit
Increase BiPAP IPAP from 14 to 20 cmH2O and reassess in 2 hours
Intubate and initiate volume-controlled ventilation with a low tidal volume strategy (Correct answer)

Correct answer: Intubate and initiate volume-controlled ventilation with a low tidal volume strategy

BiPAP failure criteria include persistent or worsening encephalopathy, failure to improve pH to above 7.25 after 1–2 hours, and hemodynamic instability. This patient has not improved sufficiently and remains somnolent — a contraindication to ongoing NIV (aspiration risk, inability to protect airway). Intubation with volume-controlled ventilation using permissive hypercapnia strategy is now indicated. Increasing IPAP further without clinical response is unlikely to succeed and delays definitive airway management. Heliox has modest evidence in COPD exacerbations but is not appropriate as a bridge when NIV is failing. Doxapram is rarely used in modern practice and is not a first-line rescue agent.

Question 40: A 20-year-old woman comes to see you for menorrhagia and easy bruising. Her gynecologist notes that the pelvic exam was normal. Additional medical history includes bruises from minor childhood injuries, sporadic spontaneous epistaxis, and heavy periods ever since menarche at age 13. She hasn't undergone surgery, but the dentist suggested a workup for a bleeding issue because she had chronic bleeding following dental extraction. She hasn't experienced any joint or deep intramuscular hemorrhage. She doesn't use any medications that affect platelet function, such as aspirin. Her family history is missing because she was adopted. Other than a few bruises on her extremities, her physical examination was normal. There is a slight iron deficient anemia. Which of the subsequent laboratory tests has the greatest chance of supporting the clinical diagnosis?

Platelet count
Activated partial thromboplastin time (aPTT)
Ristocetin-induced platelet aggregation (RIPA) (Correct answer)
Prothrombin time (PT)
Factor VIII assay

Correct answer: Ristocetin-induced platelet aggregation (RIPA)

The patient's symptoms of menorrhagia, easy bruising, sporadic epistaxis, and prolonged bleeding after dental extraction are classic for a primary hemostasis disorder, most commonly von Willebrand disease (vWD). Ristocetin-induced platelet aggregation (RIPA) is a key diagnostic test for vWD, as it assesses the function of von Willebrand factor (vWF) in mediating platelet aggregation, which is deficient or dysfunctional in this condition.

Question 41: A 38-year-old woman presents with painful oral erosions, flaccid blisters on the trunk, and positive Nikolsky sign. Direct immunofluorescence (DIF) shows intercellular IgG and C3 in a 'fishnet' pattern throughout the epidermis. Anti-desmoglein (Dsg) ELISA shows elevated anti-Dsg3 but normal anti-Dsg1 titers. Which clinical variant does this profile indicate?

Pemphigus vulgaris, mucocutaneous type
Paraneoplastic pemphigus
Pemphigus foliaceus
Pemphigus vulgaris, mucosal-dominant type (Correct answer)

Correct answer: Pemphigus vulgaris, mucosal-dominant type

Anti-Dsg3 alone (without anti-Dsg1) corresponds to mucosal-dominant pemphigus vulgaris, since Dsg3 is predominantly expressed in mucosal and suprabasal epidermal layers. When both anti-Dsg1 and anti-Dsg3 are elevated, cutaneous involvement is also prominent (mucocutaneous type). Pemphigus foliaceus targets Dsg1 only, causing superficial blisters without mucosal involvement. Paraneoplastic pemphigus shows additional anti-plakin antibodies.

Question 42: A 58-year-old man with hypertension presents with a blood pressure of 168/98 mmHg despite lifestyle modifications. He has no diabetes or CKD. What is the most appropriate first-line pharmacologic therapy?

Thiazide diuretic (Correct answer)
Beta-blocker
ACE inhibitor
Alpha-blocker

Correct answer: Thiazide diuretic

JNC guidelines and ACC/AHA recommend thiazide diuretics, ACE inhibitors, ARBs, or CCBs as first-line agents; thiazides are among the most cost-effective choices for the general population.

Question 43: What is the most important professional competency for SPEX certification in obstetrics and gynecology?

Ability to work alone exclusively
Deep knowledge combined with practical application skills (Correct answer)
Speed of task completion
Memorization of all reference materials

Correct answer: Deep knowledge combined with practical application skills

Professional competency requires both deep knowledge of the subject matter and the ability to apply that knowledge in practical situations.

Question 44: A 65-year-old man has a pearly, telangiectatic papule on his nose that has slowly enlarged over 2 years. Biopsy shows palisading nuclei at the periphery of tumor islands. What is the diagnosis?

Merkel cell carcinoma
Melanoma
Squamous cell carcinoma
Basal cell carcinoma (Correct answer)

Correct answer: Basal cell carcinoma

Basal cell carcinoma characteristically shows palisading of nuclei at the periphery of tumor nests on histology, with a pearly, telangiectatic clinical appearance.

Question 45: Which personality disorder is characterized by a pervasive pattern of grandiosity, need for admiration, and lack of empathy, occurring in a variety of contexts?

Histrionic personality disorder
Antisocial personality disorder
Borderline personality disorder
Narcissistic personality disorder (Correct answer)

Correct answer: Narcissistic personality disorder

Narcissistic personality disorder is defined by grandiosity, entitlement, need for admiration, and empathy deficits per DSM-5.

Question 46: A 72-year-old guy seeks your advice due to fatigue and sleep issues. He has trouble going to sleep, and he frequently wakes up early. He claims that since his wife passed away from cancer two years ago, he has been in a depressed mood and has trouble concentrating. She is constantly on his mind. He no longer finds enjoyment in activities he formerly did, such as swimming, hiking, and hanging out with friends. Although he had fleeting suicidal thoughts, he never actually tried to end his life. He also didn't have any delusions, hallucinations, or sporadic mood changes. He avoids using other illicit drugs and lives alone. He consumes two to three alcoholic drinks every day. He has two adult children, but since they reside out of state, he rarely sees them. He uses the alpha-adrenergic blocker tamsulosin to treat his benign prostatic hypertrophy and moderate hypertension (Flomax). What type of treatment should be started and what is the most likely diagnosis?

Drug-induced depression; stop Flomax
Bipolar disorder; start lithium
Dysthymia; start trazodone
Major depression; refer to a psychiatrist (Correct answer)
Major depression; start sertraline (Zoloft)

Correct answer: Major depression; refer to a psychiatrist

The patient's symptoms, including depressed mood, anhedonia, insomnia, fatigue, concentration issues, and fleeting suicidal thoughts, lasting for two years since his wife's death, meet the criteria for major depressive disorder. Given the chronicity, severity, and potential complexities in an elderly patient with alcohol use, referral to a psychiatrist is the most appropriate next step. A psychiatrist can provide specialized assessment, initiate appropriate antidepressant therapy, and manage potential comorbidities more effectively.

Question 47: A psychologist conducting a neuropsychological evaluation suspects a client has frontal lobe damage. Which test is MOST sensitive to executive function deficits?

Minnesota Multiphasic Personality Inventory
Rorschach Inkblot Test
Wisconsin Card Sorting Test (Correct answer)
Beck Depression Inventory

Correct answer: Wisconsin Card Sorting Test

The Wisconsin Card Sorting Test is specifically designed to measure executive functions including set-shifting, cognitive flexibility, and working memory, which are mediated by the prefrontal cortex.

Question 48: Which oral medication for severe acne vulgaris reduces sebum production but is highly teratogenic, requiring the iPLEDGE program?

Spironolactone
Isotretinoin (Correct answer)
Clindamycin
Doxycycline

Correct answer: Isotretinoin

Isotretinoin (Accutane) is a vitamin A derivative that reduces sebum production by shrinking sebaceous glands and is teratogenic, requiring monthly pregnancy tests under the iPLEDGE program.

Question 49: A 72-year-old man with heart failure (EF 35%) is started on sacubitril/valsartan. Three days later he develops angioedema of the lips and tongue requiring epinephrine. He had previously tolerated lisinopril for 4 years without incident. What is the most appropriate long-term strategy for managing his heart failure after the acute episode resolves?

Switch to valsartan monotherapy and wait 36 hours before initiating
Restart sacubitril/valsartan at half dose with close monitoring
Initiate hydralazine-isosorbide dinitrate combination therapy (Correct answer)
Switch to an ARB alone after a 36-hour washout period

Correct answer: Initiate hydralazine-isosorbide dinitrate combination therapy

Sacubitril inhibits neprilysin, which degrades bradykinin; this markedly increases bradykinin levels and angioedema risk — independent of the ACE inhibitor mechanism. Patients who develop angioedema on ARNI (sacubitril/valsartan) have a contraindication to all neprilysin inhibitors. ARBs alone do not inhibit bradykinin degradation and are generally safer, but the angioedema here occurred on sacubitril/valsartan after prior ACE inhibitor tolerance, meaning the neprilysin component is implicated. Hydralazine-isosorbide dinitrate is the evidence-based alternative (especially in self-identified Black patients) when RAAS agents are contraindicated. An ARB alone could be considered, but given the severity of the reaction involving sacubitril, the safest well-evidenced alternative for HFrEF is hydralazine-isosorbide dinitrate.

Question 50: Which approach best demonstrates mastery of pediatrics in SPEX practice?

Relying entirely on technology
Applying principles to novel situations with sound judgment (Correct answer)
Following procedures without understanding
Avoiding complex scenarios

Correct answer: Applying principles to novel situations with sound judgment

True mastery involves understanding underlying principles well enough to apply them to new and unfamiliar situations with professional judgment.

Question 51: What is the most appropriate imaging for a pregnant woman with suspected appendicitis when ultrasound is inconclusive?

Nuclear medicine scan
Plain abdominal X-ray
MRI abdomen without contrast (Correct answer)
CT abdomen and pelvis without contrast

Correct answer: MRI abdomen without contrast

MRI without contrast is preferred in pregnancy for inconclusive ultrasound findings because it avoids ionizing radiation while providing excellent soft tissue detail.

Question 52: A 40-year-old man with alcohol use disorder presents with confusion, ophthalmoplegia, and ataxia after 5 days of poor oral intake. What is the immediate treatment?

Oral thiamine 100 mg daily
IV thiamine 500 mg followed by dextrose (Correct answer)
IV dextrose followed by thiamine
High-dose IV multivitamins without thiamine

Correct answer: IV thiamine 500 mg followed by dextrose

Wernicke encephalopathy requires immediate high-dose IV thiamine before glucose to prevent precipitating or worsening the encephalopathy.

Question 53: A 6-week-old presents with projectile vomiting after every feeding. The vomitus is non-bilious and the infant appears hungry after vomiting. What is the most likely diagnosis?

Intussusception
Gastroesophageal reflux
Pyloric stenosis (Correct answer)
Hirschsprung disease

Correct answer: Pyloric stenosis

Pyloric stenosis classically presents at 3–6 weeks with non-bilious projectile vomiting and a palpable 'olive' mass in the right upper quadrant.

Question 54: A 34-year-old woman with relapsing-remitting MS on natalizumab for 30 months develops subacute cognitive decline and a new enhancing lesion on MRI with unusual "Swiss cheese" appearance. Her JC virus antibody index is 3.8. The MOST critical next step in management is:

Discontinue natalizumab and initiate plasma exchange to accelerate drug clearance (Correct answer)
Perform lumbar puncture for CSF JC virus PCR before any medication change
Switch to ocrelizumab immediately to prevent further demyelination
Add high-dose IV methylprednisolone to suppress the inflammatory response

Correct answer: Discontinue natalizumab and initiate plasma exchange to accelerate drug clearance

The clinical picture strongly suggests Progressive Multifocal Leukoencephalopathy (PML), a JC virus opportunistic infection associated with natalizumab use — especially with a JC antibody index >1.5 and >24 months of treatment. The immediate priority is discontinuing natalizumab and performing plasma exchange (PLEX) to rapidly clear the drug and restore immune surveillance. While CSF PCR confirms diagnosis, the high pre-test probability and risk of fatal PML-IRIS make drug cessation and PLEX the most critical intervention.

Question 55: What is the most important professional competency for SPEX certification in surgery?

Deep knowledge combined with practical application skills (Correct answer)
Ability to work alone exclusively
Speed of task completion
Memorization of all reference materials

Correct answer: Deep knowledge combined with practical application skills

Professional competency requires both deep knowledge of the subject matter and the ability to apply that knowledge in practical situations.

Question 56: A 32-year-old woman at 28 weeks gestation has a blood pressure of 155/100 mmHg and 2+ proteinuria on two occasions. What is the most likely diagnosis?

Preeclampsia (Correct answer)
Gestational hypertension
HELLP syndrome
Chronic hypertension

Correct answer: Preeclampsia

Preeclampsia is defined as hypertension ≥ 140/90 mmHg plus proteinuria occurring after 20 weeks of gestation.

Question 57: A 58-year-old woman presents with a pruritic, violaceous, flat-topped papule on her flexor wrist for 3 months. Biopsy shows a band-like lymphocytic infiltrate at the dermoepidermal junction with sawtooth rete ridges and Civatte bodies. She recently started hydrochlorothiazide 6 months ago. Which finding would most strongly support a lichenoid drug reaction over idiopathic lichen planus?

Involvement of the buccal mucosa
Presence of eosinophils within the dermal infiltrate (Correct answer)
Wickham's striae visible on dermoscopy
Positive direct immunofluorescence for IgM at the DEJ

Correct answer: Presence of eosinophils within the dermal infiltrate

Lichenoid drug eruptions (LDE) mimic lichen planus histologically but characteristically show eosinophils and plasma cells in the dermal infiltrate, parakeratosis, and less prominent Civatte bodies compared to true LP. Eosinophils within the band-like infiltrate is the hallmark distinguishing feature. Mucous membrane involvement, IgM deposits at the DEJ (cytoid bodies), and Wickham's striae can occur in both idiopathic LP and LDE.

Question 58: A 17-year-old presents with cyclic pelvic pain, a normal pelvic exam, and MRI showing a hematocolpos with absent vaginal lumen. What is the diagnosis?

Labial fusion
Transverse vaginal septum (Correct answer)
Müllerian agenesis
Imperforate hymen

Correct answer: Transverse vaginal septum

A transverse vaginal septum causes outflow obstruction with hematocolpos; unlike imperforate hymen, the external genitalia appear normal and the obstruction is at a higher level.

Question 59: A patient taking carbamazepine for trigeminal neuralgia develops progressively worsening hyponatremia (Na⁺ 126 mEq/L) without edema, normal thyroid function, and normal cortisol levels. Urine osmolality is inappropriately elevated. What is the mechanism of this adverse effect?

Carbamazepine induces CYP3A4, accelerating aldosterone metabolism and producing a secondary hypoaldosteronism
Carbamazepine potentiates the effect of ADH at V2 receptors in the renal collecting duct, causing SIADH-like water retention (Correct answer)
Carbamazepine blocks aquaporin-2 insertion into the collecting duct, paradoxically causing water retention through reflex ADH hypersecretion
Carbamazepine directly inhibits the renal Na-K-ATPase pump, impairing sodium reabsorption in the collecting duct

Correct answer: Carbamazepine potentiates the effect of ADH at V2 receptors in the renal collecting duct, causing SIADH-like water retention

Carbamazepine causes SIADH (syndrome of inappropriate antidiuretic hormone secretion) by potentiating the action of ADH (vasopressin) at V2 receptors in the renal collecting duct, increasing water reabsorption. This leads to dilutional hyponatremia with inappropriately concentrated urine. This is a well-recognized adverse effect, particularly in elderly patients. The other options describe incorrect mechanisms—carbamazepine does not inhibit Na-K-ATPase, does not block aquaporin-2, and CYP3A4 induction does not cause hyponatremia.

Question 60: A 34-year-old man with HIV (CD4 count 85 cells/µL) presents with rapidly enlarging, tender, vascular nodules on the legs and a concurrent papular eruption on the trunk. Bacillary angiomatosis is suspected. Which organism is responsible, and what is the treatment of choice?

Bartonella henselae or B. quintana; erythromycin or doxycycline (Correct answer)
Kaposi sarcoma-associated herpesvirus; antiretroviral therapy alone
Treponema pallidum; benzathine penicillin G
Cryptococcus neoformans; fluconazole

Correct answer: Bartonella henselae or B. quintana; erythromycin or doxycycline

Bacillary angiomatosis is caused by Bartonella henselae (cat-scratch exposure) or B. quintana (body louse exposure) in immunocompromised patients, particularly those with HIV and low CD4 counts. It presents as vascular proliferations that clinically resemble Kaposi sarcoma. Biopsy shows lobular vascular proliferation with clumps of granular material (bacteria visible on Warthin-Starry stain). First-line treatment is erythromycin 500 mg QID or doxycycline 100 mg BID for at least 3 months to prevent relapse.

Question 61: A 61-year-old man undergoes a Whipple procedure (pancreaticoduodenectomy) for a pancreatic head adenocarcinoma. On postoperative day 5, serum amylase from the closed-suction drain measures 4,200 U/L (>3× upper limit of normal). He is tolerating a soft diet and has no fever or peritoneal signs. Drain output is 180 mL/day of serosanguineous fluid. According to the International Study Group of Pancreatic Fistula (ISGPF) classification, what grade is this leak and what is the most appropriate next step?

Grade A fistula (biochemical leak) — maintain drain in place, continue diet, repeat amylase in 3-4 days (Correct answer)
Grade B fistula — continue current management but remove the drain
Grade B fistula — initiate octreotide and transition to TPN
Grade C fistula — return to OR for completion pancreatectomy

Correct answer: Grade A fistula (biochemical leak) — maintain drain in place, continue diet, repeat amylase in 3-4 days

The ISGPF 2016 revised classification defines a Grade A postoperative pancreatic fistula (POPF) — now termed 'biochemical leak' — as drain amylase >3× upper normal limit on postoperative day 3 or beyond without any clinical impact, change in management, or deviation from the expected postoperative course. This patient is asymptomatic, tolerating diet, afebrile, and without peritoneal signs — meeting Grade A criteria. Management is observation: maintain the drain in place to monitor output, continue oral intake, and recheck drain amylase in 3-4 days. Grade B requires a clinically relevant change in management (prolonged drain, restart TPN, antibiotics, or IR/endoscopic intervention). Grade C involves life-threatening deterioration requiring re-operation. Initiating octreotide or TPN in a Grade A patient is not indicated.

Question 62: Which of the following is the most common type of primary brain tumor in adults?

Ependymoma
Oligodendroglioma
Glioblastoma multiforme (Correct answer)
Meningioma

Correct answer: Glioblastoma multiforme

Glioblastoma multiforme (GBM) is the most common and most malignant primary brain tumor in adults, with a median survival of 14–16 months.

Question 63: A 28-year-old presents with fever, nuchal rigidity, and a petechial rash. CSF analysis shows WBC 2,400 cells/µL (95% neutrophils), glucose 28 mg/dL (serum glucose 110 mg/dL), and protein 420 mg/dL. Blood cultures are drawn. The patient has a documented anaphylactic reaction to penicillin. What is the MOST appropriate antibiotic regimen?

Meropenem + dexamethasone
Vancomycin + meropenem + dexamethasone (Correct answer)
Vancomycin + aztreonam + dexamethasone
Chloramphenicol + dexamethasone

Correct answer: Vancomycin + meropenem + dexamethasone

In bacterial meningitis with severe penicillin allergy (anaphylaxis), cephalosporins are contraindicated due to cross-reactivity risk in true anaphylaxis. Meropenem is the preferred carbapenem for CNS infections (better CNS penetration than imipenem, lower seizure risk). Vancomycin is added to cover resistant pneumococcus. Dexamethasone is added to reduce inflammation. Aztreonam covers gram-negatives but lacks gram-positive coverage and would miss Streptococcus pneumoniae. Chloramphenicol is a historical option but inferior in efficacy and toxicity profile.

Question 64: A 5-year-old with sickle cell disease presents with fever of 38.8°C. What is the most critical immediate action?

Obtain blood culture and give empiric IV cephalosporin (Correct answer)
Prescribe oral amoxicillin and follow up in 48 hours
Start IV hydration only
Administer hydroxyurea

Correct answer: Obtain blood culture and give empiric IV cephalosporin

Febrile children with sickle cell disease are at high risk for overwhelming sepsis from encapsulated organisms and require immediate blood cultures and empiric IV antibiotics.

Question 65: A patient taking phenelzine for depression presents to the ER after self-administering dextromethorphan (DXM) from an OTC cough syrup. Which syndrome is the primary concern and what is its mechanism?

Hypertensive crisis via DXM's sympathomimetic action and MAO-mediated tyramine accumulation
Anticholinergic toxidrome via DXM's muscarinic blockade potentiated by MAO inhibition
Opioid toxicity via DXM's mu-receptor agonism amplified by reduced MAO-mediated breakdown
Serotonin syndrome via excess serotonergic activity from MAO inhibition plus DXM's serotonin reuptake inhibition (Correct answer)

Correct answer: Serotonin syndrome via excess serotonergic activity from MAO inhibition plus DXM's serotonin reuptake inhibition

DXM is a sigma-1 receptor agonist and a weak serotonin reuptake inhibitor (SERT inhibitor). When combined with an irreversible MAO inhibitor like phenelzine, which prevents serotonin degradation, the two mechanisms converge to cause serotonin syndrome: hyperthermia, clonus, hyperreflexia, diaphoresis, and agitation. This combination is absolutely contraindicated. DXM does have weak mu-opioid activity, but this is not the dominant clinical concern with MAOI co-administration.

Question 66: A 58-year-old man undergoes elective sigmoid colectomy. On postoperative day 5, he develops fever (38.9°C), tachycardia, and left lower quadrant tenderness. CT scan shows a 4 cm pericolic fluid collection with a small amount of free air. Which management strategy is most appropriate?

Diverting loop ileostomy without resection
Immediate return to the OR for exploratory laparotomy
IV antibiotics alone with serial abdominal exams
CT-guided percutaneous drainage and broad-spectrum antibiotics (Correct answer)

Correct answer: CT-guided percutaneous drainage and broad-spectrum antibiotics

A contained anastomotic leak with a small pericolic abscess (<5 cm) and no diffuse peritonitis is best managed with CT-guided percutaneous drainage combined with broad-spectrum antibiotics. This allows source control without the morbidity of re-operation in a recently operated patient. Immediate laparotomy is reserved for diffuse fecal peritonitis, hemodynamic instability, or failure of non-operative management. Antibiotics alone are insufficient for a walled-off collection requiring drainage.

Question 67: A 55-year-old man with hypertension and gout presents with a serum uric acid of 9.8 mg/dL and his third gout flare this year. Which antihypertensive agent would be MOST beneficial to add given his history?

Amlodipine
Losartan (Correct answer)
Metoprolol
Hydrochlorothiazide

Correct answer: Losartan

Losartan (an ARB) has uricosuric properties that lower serum uric acid, making it a preferred antihypertensive in patients with gout.

Question 68: A 38-year-old G3P2 at 36 weeks gestation with dichorionic-diamniotic twins presents for a routine visit. Twin A is vertex, Twin B is transverse. She desires vaginal delivery. Estimated fetal weights are Twin A 2,550 g and Twin B 2,480 g. Which factor would most absolutely contraindicate an attempt at vaginal delivery in this case?

Maternal age over 35 years
Twin B estimated weight >20% larger than Twin A (Correct answer)
Gestational age of 36 weeks
Twin B in transverse lie

Correct answer: Twin B estimated weight >20% larger than Twin A

When Twin B is significantly larger than Twin A (discordance >20%), vaginal delivery of Twin A first can result in entrapment or obstruction when attempting delivery of the larger Twin B — this is an absolute contraindication to planned vaginal delivery of twins. Twin B's transverse lie is NOT an absolute contraindication because it may be managed with external cephalic version or internal podalic version followed by breech extraction after Twin A delivers and the uterus is still relaxed. Advanced maternal age and late preterm gestational age are not contraindications. The weight discordance threshold of >20% is the key absolute contraindication listed here.

Question 69: A 19-year-old presents with primary amenorrhea, absent breast development, normal pubic hair, and a 46,XY karyotype. What is the most likely diagnosis?

Turner syndrome
Complete androgen insensitivity syndrome
Swyer syndrome (Correct answer)
Congenital adrenal hyperplasia

Correct answer: Swyer syndrome

Swyer syndrome (46,XY complete gonadal dysgenesis) presents with female phenotype, absent puberty, and streak gonads; gonads must be removed due to malignancy risk.

Question 70: Which approach best demonstrates mastery of neurology in SPEX practice?

Applying principles to novel situations with sound judgment (Correct answer)
Relying entirely on technology
Following procedures without understanding
Avoiding complex scenarios

Correct answer: Applying principles to novel situations with sound judgment

True mastery involves understanding underlying principles well enough to apply them to new and unfamiliar situations with professional judgment.

Question 71: A 28-year-old male veteran presents with nightmares, hypervigilance, and emotional numbing 14 months after a combat deployment. He has failed two adequate SSRI trials. He now reports passive suicidal ideation without plan or intent. Which pharmacologic agent has the STRONGEST evidence as an augmentation strategy specifically targeting PTSD nightmares?

Nabilone
Quetiapine
Topiramate
Prazosin (Correct answer)

Correct answer: Prazosin

Prazosin, an alpha-1 adrenergic antagonist, has the most robust randomized controlled trial evidence specifically for PTSD-related nightmares and sleep disturbance. It reduces noradrenergic activity during REM sleep. Quetiapine has limited evidence as augmentation. Topiramate has some data but is not FDA-indicated and evidence is mixed. Nabilone (a cannabinoid) has preliminary data in treatment-resistant PTSD nightmares but far less evidence than prazosin.

Question 72: A 45-year-old man presents with episodic attacks of severe unilateral orbital pain lasting 15–20 minutes, occurring 10–20 times per day for 3 weeks, then remitting for months. He notes ipsilateral ptosis, lacrimation, and nasal congestion during attacks. He failed to respond to sumatriptan. Which of the following is the most appropriate treatment to ABORT acute attacks?

Subcutaneous sumatriptan 6 mg
Intranasal lidocaine 4% ipsilateral to the pain (Correct answer)
High-flow oxygen at 12 L/min via non-rebreather mask
Indomethacin 75 mg oral with food

Correct answer: Intranasal lidocaine 4% ipsilateral to the pain

The clinical description is consistent with Short-lasting Unilateral Neuralgiform headache attacks with Conjunctival injection and Tearing (SUNCT) or Short-lasting Unilateral Neuralgiform attacks with cranial Autonomic symptoms (SUNA), given attack duration of 15–20 minutes and very high frequency (10–20/day). SUNCT/SUNA does NOT respond to indomethacin (which is the hallmark treatment for paroxysmal hemicrania), nor reliably to triptans or oxygen. Intranasal lidocaine is the recommended acute abortive therapy for SUNCT. High-flow oxygen works for cluster headache; indomethacin is diagnostic for paroxysmal hemicrania (attacks last 2–30 minutes but typically fewer per day and respond absolutely to indomethacin).

Question 73: What is the first-line treatment for mild to moderate atopic dermatitis in adults?

Phototherapy
Oral antihistamines
Systemic corticosteroids
Topical corticosteroids (Correct answer)

Correct answer: Topical corticosteroids

Topical corticosteroids are the first-line treatment for mild to moderate atopic dermatitis, directly reducing skin inflammation and pruritus.

Question 74: A chemical plant worker develops peripheral neuropathy after chronic low-level exposure to n-hexane. The primary toxic metabolite responsible is:

Benzene diol epoxide
Methyl hippuric acid
2,5-hexanedione (Correct answer)
Trichloroacetic acid

Correct answer: 2,5-hexanedione

n-Hexane is metabolized to 2,5-hexanedione, which crosslinks neurofilament proteins causing the characteristic 'giant axon' neuropathy.

Question 75: Which scoring system is used to predict the severity of acute pancreatitis and assess the risk of mortality within 48 hours of admission?

Glasgow Blatchford score
MELD score
Child-Pugh score
APACHE II score and Ranson's criteria (Correct answer)

Correct answer: APACHE II score and Ranson's criteria

APACHE II score and Ranson's criteria are both used to stratify severity of acute pancreatitis; Ranson's uses 11 criteria assessed at admission and 48 hours.

Question 76: Which statistical index is most appropriate for evaluating the clinical significance of treatment change in an individual client?

Pearson correlation coefficient
Reliable Change Index (RCI) (Correct answer)
Cohen's d
Odds ratio

Correct answer: Reliable Change Index (RCI)

The Reliable Change Index (RCI) determines whether the magnitude of change in a client's score exceeds what would be expected by measurement error alone, making it ideal for assessing individual clinical significance.

Question 77: According to DSM-5, persistent depressive disorder (dysthymia) requires a depressed mood for at least:

1 month
2 weeks
2 years (Correct answer)
6 months

Correct answer: 2 years

DSM-5 requires at least 2 years of depressed mood (1 year in children/adolescents) for a diagnosis of persistent depressive disorder.

Question 78: A 68-year-old develops sudden onset vertigo, ipsilateral facial numbness, dysphagia, and contralateral loss of pain/temperature in the limbs. Which artery is affected?

Basilar artery
Middle cerebral artery
Posterior inferior cerebellar artery (Correct answer)
Anterior cerebral artery

Correct answer: Posterior inferior cerebellar artery

Posterior inferior cerebellar artery (PICA) occlusion causes Wallenberg (lateral medullary) syndrome with the described crossed findings.

Question 79: In SPEX practice, what is the best approach to quality improvement in psychiatry?

Use data-driven methods with measurable outcomes (Correct answer)
Make changes without measuring results
Copy what other organizations do without analysis
Wait for problems to occur before acting

Correct answer: Use data-driven methods with measurable outcomes

Data-driven quality improvement with measurable outcomes ensures that changes actually produce the intended improvements and can be verified.

Question 80: A 71-year-old woman with osteoporosis (T-score −2.9 at lumbar spine) has been on oral alendronate for 7 years. She reports new right thigh pain for 3 weeks with no trauma. X-ray of the femur shows focal cortical thickening of the lateral cortex at the subtrochanteric region. What is the most appropriate next step?

Order a bone scan and continue current therapy while awaiting results
Switch to denosumab, which has a lower risk of this complication
Continue alendronate and add teriparatide to accelerate bone healing
Obtain an MRI of the femur and discontinue bisphosphonate therapy pending results (Correct answer)

Correct answer: Obtain an MRI of the femur and discontinue bisphosphonate therapy pending results

This presentation is classic for an atypical femoral fracture (AFF) — a well-recognized but rare complication of long-term bisphosphonate therapy. The lateral cortical thickening ('beaking') at the subtrochanteric region on X-ray is the prodromal 'dreaded black line.' Bisphosphonates must be discontinued immediately when AFF is suspected, and MRI is the most sensitive imaging to characterize the incomplete fracture and guide orthopedic intervention. Continuing bisphosphonates or switching to denosumab (which has a similar mechanism of osteoclast suppression) is inappropriate. Teriparatide is sometimes used adjunctively after AFF diagnosis but is not the immediate next step before confirming the diagnosis.

Question 81: A 28-year-old woman presents with episodic severe unilateral headache with allodynia, ptosis, and miosis ipsilateral to the pain. Attacks last 15–180 minutes and recur up to 8 times daily in clusters. Unlike migraine, the attacks are associated with prominent ipsilateral autonomic features and extreme agitation. She reports that indomethacin provides no benefit, but high-flow 100% oxygen aborts attacks within 15 minutes. Which condition best fits, and what is the first-line preventive therapy?

Paroxysmal hemicrania; indomethacin
SUNCT syndrome; lamotrigine
Hemicrania continua; indomethacin
Cluster headache; verapamil (Correct answer)

Correct answer: Cluster headache; verapamil

Cluster headache is distinguished by attacks lasting 15–180 minutes (up to 8/day), severe unilateral periorbital pain, ipsilateral cranial autonomic features (ptosis, miosis, lacrimation, rhinorrhea), and characteristic patient agitation/restlessness. High-flow oxygen (100% at 12–15 L/min) is first-line abortive therapy. Verapamil is the gold-standard preventive agent. Paroxysmal hemicrania is exquisitely indomethacin-responsive — its absence here rules it out. SUNCT features shorter, more frequent attacks (seconds duration) and is treated with lamotrigine.

Question 82: A child presents with a pruritic, honey-crusted lesion around the mouth. What is the first-line treatment?

Oral fluconazole
Oral amoxicillin
Topical hydrocortisone
Topical mupirocin (Correct answer)

Correct answer: Topical mupirocin

Localized impetigo is best treated with topical mupirocin, which targets S. aureus and Streptococcus pyogenes.

Question 83: A 9-month-old is brought in for recurrent otitis media. Which organism is the MOST common cause of acute otitis media in children?

Haemophilus influenzae
Moraxella catarrhalis
Staphylococcus aureus
Streptococcus pneumoniae (Correct answer)

Correct answer: Streptococcus pneumoniae

Streptococcus pneumoniae remains the most common bacterial cause of acute otitis media in children despite widespread vaccination.

Question 84: A patient presents with pill-rolling tremor at rest, cogwheel rigidity, and bradykinesia. Which area of the brain is most affected?

Hippocampus
Frontal cortex
Basal ganglia (Correct answer)
Cerebellum

Correct answer: Basal ganglia

The cardinal features of Parkinsonism result from dopamine depletion in the basal ganglia, specifically the substantia nigra.

Question 85: Which therapy is the first-line evidence-based treatment for PTSD according to VA/DoD and APA guidelines?

Supportive counseling
Eye movement desensitization (EMDR) alone
Psychodynamic psychotherapy
Prolonged Exposure or Cognitive Processing Therapy (Correct answer)

Correct answer: Prolonged Exposure or Cognitive Processing Therapy

Prolonged Exposure (PE) and Cognitive Processing Therapy (CPT) are the most strongly evidence-based, guideline-recommended treatments for PTSD.

Question 86: Which is the preferred vasopressor for septic shock when adequate fluid resuscitation has failed?

Vasopressin
Dopamine
Norepinephrine (Correct answer)
Epinephrine

Correct answer: Norepinephrine

Norepinephrine is the first-line vasopressor for septic shock per Surviving Sepsis Campaign guidelines due to its alpha-adrenergic properties with less tachycardia risk.

Question 87: Which of the following MOST accurately describes the relationship between the SPEX and the AQB's National Uniform Licensing and Certification Examinations (NULCE)?

The SPEX is a supplemental examination that tests education equivalency for reciprocal applicants who were originally licensed under a NULCE-compliant exam; it does not substitute for initial licensure examination requirements. (Correct answer)
The NULCE has been fully retired and replaced by the SPEX for all appraisal licensing examinations nationwide.
The SPEX and NULCE are interchangeable; passing either satisfies both the initial licensing exam and the reciprocity education waiver.
The SPEX replaces the NULCE for reciprocal applicants only; an appraiser who passed the NULCE for initial licensure must still pass the SPEX separately to obtain reciprocal licensure.

Correct answer: The SPEX is a supplemental examination that tests education equivalency for reciprocal applicants who were originally licensed under a NULCE-compliant exam; it does not substitute for initial licensure examination requirements.

The SPEX (Special Purpose Examination) is specifically designed for appraisers seeking reciprocal licensure who need to demonstrate equivalency to a receiving state's education hour requirements — not initial licensure. An appraiser originally licensed via the NULCE does not need to retake the NULCE for reciprocity; instead, the SPEX addresses the education waiver pathway. The two exams serve distinct purposes in the credentialing system.

Question 88: On CT pulmonary angiography (CTPA), which finding is most diagnostic of acute pulmonary embolism?

Wedge-shaped pleural-based consolidation without vessel involvement
Ground-glass opacity in a peripheral distribution
A filling defect within a contrast-enhanced pulmonary artery that is partially or completely outlined by contrast (Correct answer)
Cardiomegaly with bilateral pleural effusions

Correct answer: A filling defect within a contrast-enhanced pulmonary artery that is partially or completely outlined by contrast

The direct sign of PE on CTPA is an intraluminal filling defect — a clot seen as a low-attenuation structure surrounded by high-attenuation contrast within the pulmonary artery.

Question 89: A 45-year-old woman presents with a 3-year history of recurrent episodes of painful, erythematous nodules on the anterior shins that resolve with bruise-like discoloration without ulceration. She has a chronic dry cough and elevated serum ACE levels. A punch biopsy of a fresh nodule reveals septal panniculitis without vasculitis. Which of the following best characterizes the underlying histologic finding and its significance?

Lobular panniculitis with fat necrosis — indicates a vasculitic process requiring anticoagulation
Septal panniculitis with Miescher radial granulomas — pathognomonic for the associated systemic disease (Correct answer)
Septal panniculitis with dense lymphocytic infiltrate only — rules out the suspected diagnosis
Mixed septal-lobular panniculitis with lymphocytic infiltrate — consistent with lupus profundus

Correct answer: Septal panniculitis with Miescher radial granulomas — pathognomonic for the associated systemic disease

This presentation is classic for erythema nodosum (EN) associated with sarcoidosis (elevated ACE, chronic cough). The histologic hallmark of EN is septal panniculitis (inflammation primarily in the fibrous septa between fat lobules) without vasculitis. Miescher's radial granulomas — small, nodular aggregates of histiocytes arranged radially around a central stellate cleft — are considered pathognomonic for erythema nodosum and help distinguish it from other forms of panniculitis. Their presence on biopsy, combined with the elevated ACE and pulmonary symptoms, strongly supports sarcoidosis-associated EN (Löfgren syndrome when accompanied by bilateral hilar adenopathy and arthritis). Treatment is primarily NSAIDs or potassium iodide; addressing the underlying sarcoidosis is key.

Question 90: A 70-year-old immunocompetent man develops a rapidly enlarging, dome-shaped, flesh-colored nodule with a central keratin-filled crater on sun-exposed skin of the cheek over 6–8 weeks. Histology shows a symmetric, well-differentiated, crateriform squamous proliferation with glassy cytoplasm and prominent eosinophilic keratinization. He is anxious about prognosis. Which statement is MOST accurate regarding management?

Mohs micrographic surgery is contraindicated for crateriform lesions on the face
Topical imiquimod is the standard of care for facial keratoacanthomas in elderly patients
Excision with histologic margin assessment is preferred because reliable histologic distinction from invasive SCC is impossible on small biopsies (Correct answer)
Observation is appropriate since keratoacanthomas uniformly self-resolve within 3 months

Correct answer: Excision with histologic margin assessment is preferred because reliable histologic distinction from invasive SCC is impossible on small biopsies

Keratoacanthomas (KA) may spontaneously regress, but they cannot be reliably distinguished from well-differentiated invasive squamous cell carcinoma on incisional or shave biopsy alone because the crateriform architecture is required for diagnosis. On a small biopsy, histologic features overlap entirely with SCC. Excision (or Mohs for facial lesions) provides definitive diagnosis and treatment simultaneously. Observation risks missing an SCC. Imiquimod has limited evidence and is not standard of care.

Question 91: Which electrolyte imbalance is most commonly associated with loop diuretic use?

Hypermagnesemia
Hypernatremia
Hyperkalemia
Hypokalemia (Correct answer)

Correct answer: Hypokalemia

Loop diuretics increase urinary excretion of potassium, sodium, and chloride, with hypokalemia being the most clinically significant electrolyte disturbance.

Question 92: A 38-year-old woman with a known bicornuate uterus and two prior uterine surgeries presents at 22 weeks with an anterior placenta previa. MRI reveals loss of the normal retroplacental clear zone with irregular uterine serosa and placental tissue extending into the bladder wall. Which of the following best describes the optimal delivery plan?

Scheduled cesarean delivery at 36–37 weeks with uterine conservation attempted via triple-P procedure
Cesarean delivery at 37–39 weeks with intraoperative decision for hysterectomy based on intraoperative findings
Vaginal delivery with immediate postpartum hysterectomy if hemorrhage exceeds 1500 mL
Scheduled cesarean hysterectomy at 34–35 weeks with urology on standby and cell saver available, at a center with massive transfusion protocol capability (Correct answer)

Correct answer: Scheduled cesarean hysterectomy at 34–35 weeks with urology on standby and cell saver available, at a center with massive transfusion protocol capability

This presentation is consistent with placenta percreta (Accreta Spectrum Disorder grade 3) with bladder invasion—the most severe form. Optimal management involves planned cesarean hysterectomy at 34–35 weeks (balancing fetal maturity against increasing hemorrhage risk as pregnancy advances), performed at a center of excellence with a multidisciplinary team including urology, blood bank with MTP capability, and interventional radiology. Attempting uterine conservation (triple-P) is not appropriate when bladder invasion is confirmed on MRI. Emergency delivery or waiting until term significantly increases maternal mortality risk.

Question 93: Which imaging modality best characterizes liver lesions detected incidentally on CT?

PET scan
Plain abdominal X-ray
MRI with hepatobiliary contrast agent (Correct answer)
Technetium-labeled RBC scan

Correct answer: MRI with hepatobiliary contrast agent

MRI with hepatobiliary contrast agents (e.g., gadoxetate disodium) provides excellent characterization of focal liver lesions including hemangiomas, HCC, and metastases.

Question 94: Which finding on EEG is pathognomonic for herpes simplex encephalitis?

3 Hz spike-and-wave discharges
Periodic lateralized epileptiform discharges (PLEDs) in temporal regions (Correct answer)
Generalized slowing
Burst suppression pattern

Correct answer: Periodic lateralized epileptiform discharges (PLEDs) in temporal regions

HSV encephalitis classically produces periodic lateralized epileptiform discharges (PLEDs) in the temporal lobes on EEG.

Question 95: A 66-year-old man presents with fluctuating cognition, vivid visual hallucinations of animals, and parkinsonism. He was given haloperidol by an emergency physician for agitation and developed profound rigidity and decreased consciousness within 24 hours. Which mechanism BEST explains his severe neuroleptic sensitivity reaction?

Blockade of D2 receptors in a nigrostriatal system already depleted of dopaminergic neurons (Correct answer)
Serotonin syndrome triggered by dopamine receptor downregulation in the raphe nuclei
Autoimmune encephalitis exacerbated by neuroleptic-induced blood-brain barrier disruption
Anticholinergic toxicity unmasking underlying cholinergic excess in the basal forebrain

Correct answer: Blockade of D2 receptors in a nigrostriatal system already depleted of dopaminergic neurons

This is Dementia with Lewy Bodies (DLB). Patients with DLB have profound presynaptic dopaminergic deficiency in the striatum due to alpha-synuclein pathology. D2 receptor blockade by typical antipsychotics (like haloperidol) in an already critically dopamine-depleted system causes catastrophic worsening — severe parkinsonism, reduced consciousness, autonomic instability, and potentially fatal neuroleptic sensitivity in up to 50% of DLB patients. Atypical antipsychotics (quetiapine, clozapine) with low D2 affinity are used cautiously if necessary.

Question 96: The characteristic rash of Lyme disease, erythema migrans, is best described as which pattern?

Bull's-eye (target) pattern expanding from bite site (Correct answer)
Petechial rash on trunk and extremities
Malar butterfly rash sparing nasolabial folds
Vesicular eruption along a dermatome

Correct answer: Bull's-eye (target) pattern expanding from bite site

Erythema migrans presents as a bull's-eye or target pattern that expands outward from the tick bite site, representing the hallmark early sign of Lyme disease.

Question 97: Which of the following is the most effective primary prevention strategy for cardiovascular disease in the general population?

Daily low-dose aspirin for all adults over 40
Routine coronary artery calcium scoring
Prescribing statins to all adults
Smoking cessation, diet modification, and exercise (Correct answer)

Correct answer: Smoking cessation, diet modification, and exercise

Lifestyle modifications including smoking cessation, healthy diet, and regular physical activity are the cornerstone of primary cardiovascular disease prevention.

Question 98: In SPEX-based XRF analysis, a certified reference soil standard is used to validate a pressed-pellet method for arsenic. Results are consistently 12–15% low compared to the certified value, even though results for iron, calcium, and zinc are within ±3%. The most probable explanation is:

Arsenic is preferentially lost during the grinding and pressing process due to its relatively high vapor pressure as an oxide
The arsenic Kα line at ~10.5 keV is being absorbed by the pellet binder material (wax or cellulose) more severely than higher-energy analyte lines
Matrix absorption enhancement by iron is suppressing the arsenic Kα fluorescence signal because iron's K-edge energy is just above the arsenic Kα emission (Correct answer)
The X-ray tube voltage is insufficient to excite arsenic efficiently, causing reduced characteristic emission intensity relative to heavier elements

Correct answer: Matrix absorption enhancement by iron is suppressing the arsenic Kα fluorescence signal because iron's K-edge energy is just above the arsenic Kα emission

In iron-rich soil matrices, the high iron concentration creates a significant X-ray absorption effect on arsenic Kα fluorescence (~10.5 keV). Iron's K-absorption edge (7.11 keV) is below the As Kα energy, meaning iron atoms efficiently absorb arsenic's fluorescent X-rays before they can exit the sample and reach the detector. This matrix absorption effect causes a systematic negative bias for arsenic specifically in iron-rich samples — elements with higher-energy characteristic lines (like zinc Kα at ~8.6 keV relative to the iron matrix) are less severely affected. The correct remedy is to use matrix-matched calibration standards or apply fundamental parameter corrections accounting for the iron content.

Question 99: During a systematic review of mammography screening trials, an analyst notes that the trials with shorter follow-up periods show a larger reduction in breast cancer mortality than those with longer follow-up. Which bias MOST likely explains this finding?

Lead-time bias inflating apparent mortality benefit in short-term trials (Correct answer)
Volunteer bias due to healthier women self-selecting into screening arms
Length-biased sampling overrepresenting slow-growing tumors in screened groups
Overdiagnosis bias masking true mortality differences in long-term data

Correct answer: Lead-time bias inflating apparent mortality benefit in short-term trials

Lead-time bias occurs when screening detects disease earlier in its natural history, making survival appear longer (or mortality appear lower) without actually altering the disease course. In short-term trials, screened patients who are diagnosed earlier appear to survive longer simply because the clock starts earlier — mortality events may not yet have occurred by the end of follow-up. As follow-up lengthens, the mortality curves converge as the postponed deaths accumulate, diminishing the apparent benefit. Length-biased sampling is a real phenomenon in screening but would tend to persist over time rather than diminish with follow-up. Overdiagnosis would reduce apparent mortality in the screened group but would not explain a time-dependent attenuation.

Question 100: A nuclear medicine physician reviews a bone scintigraphy study in a patient with known prostate cancer. The scan shows markedly increased uptake throughout nearly the entire skeleton with no apparent normal bone activity, and the kidneys are barely visualized. Which interpretation is most accurate?

Paget's disease of bone with polyostotic involvement
Super scan due to diffuse osteoblastic metastatic disease with minimal renal excretion (Correct answer)
Technical artifact from incorrect radiopharmaceutical dose or preparation
Photopenic (cold) lesions consistent with lytic metastatic disease replacing marrow

Correct answer: Super scan due to diffuse osteoblastic metastatic disease with minimal renal excretion

A 'superscan' occurs when there is such widespread uptake in osteoblastic metastases throughout the skeleton that it consumes nearly all the Tc-99m MDP, leaving minimal free tracer for renal excretion — explaining the faint or absent kidney visualization. The scan appears diffusely and symmetrically bright rather than showing discrete lesions. This pattern is classically associated with diffuse osteoblastic metastases (prostate, breast cancer) and can be mistaken for a normal scan by the inexperienced reader. Key clues are absent or faint kidneys and lack of expected soft-tissue background activity.

Question 101: A 28-year-old man presents with 3 months of auditory hallucinations, social withdrawal, and flat affect. His symptoms began insidiously and have never fully remitted. He has no prior psychiatric history and denies substance use. Urine toxicology is negative. MRI brain is unremarkable. Which finding on neuropsychological testing would MOST strongly support a diagnosis of schizophrenia over a primary mood disorder with psychotic features?

Deficits in sustained attention and working memory that predate psychosis onset (Correct answer)
Diffuse cognitive deficits with preserved insight
Selective impairment in affective recognition tasks
Impaired verbal memory with intact processing speed

Correct answer: Deficits in sustained attention and working memory that predate psychosis onset

Schizophrenia is associated with neurocognitive deficits — particularly in working memory, attention, and processing speed — that predate the full onset of psychosis and are considered trait markers rather than state markers. The premorbid cognitive deficits, especially in sustained attention and working memory, distinguish schizophrenia from mood disorders with psychotic features, where cognitive impairment is typically state-dependent (occurring during episodes). Verbal memory deficits and affective recognition deficits can occur in both conditions.

Question 102: A 34-year-old male sustains blunt abdominal trauma in a motor vehicle collision. FAST exam is positive. CT reveals a grade IV splenic laceration with active extravasation and a grade II liver laceration without active bleeding. He is hemodynamically stable with BP 108/72 after 2L crystalloid. His INR is 1.1 and hemoglobin is 9.2 g/dL. What is the most appropriate management?

Nonoperative management with ICU monitoring
Angioembolization of the splenic artery (Correct answer)
Emergent exploratory laparotomy with splenectomy
Diagnostic laparoscopy followed by laparoscopic splenectomy

Correct answer: Angioembolization of the splenic artery

In a hemodynamically stable patient with a grade IV splenic laceration and CT evidence of active arterial extravasation (vascular blush), angioembolization is the preferred management. The combination of grade IV injury plus active contrast extravasation significantly increases the failure rate of pure nonoperative management (NOM), and angioembolization has been shown to reduce this failure rate from ~50% to ~10-15% in this setting. The patient's hemodynamic response to fluid resuscitation supports a non-operative approach over emergent laparotomy. Laparoscopy is not indicated for acute splenic trauma with extravasation. Pure NOM without embolization would be inappropriate given the active blush on CT.

Question 103: A Tzanck smear showing multinucleated giant cells is diagnostic of which infection?

Impetigo caused by Staphylococcus aureus
Molluscum contagiosum
Pemphigus vulgaris
Herpes simplex or varicella-zoster virus infection (Correct answer)

Correct answer: Herpes simplex or varicella-zoster virus infection

A Tzanck smear showing multinucleated giant cells (Tzanck cells) indicates herpes simplex or varicella-zoster virus infection, though it cannot distinguish between the two.

Question 104: A 52-year-old woman presents with episodic hypertension (BP 210/115 mmHg during attacks), diaphoresis, palpitations, and a 9 kg weight loss over 4 months. 24-hour urine fractionated metanephrines are markedly elevated. CT abdomen reveals a 4.2 cm right adrenal mass. She is scheduled for adrenalectomy in 3 weeks. Which of the following preoperative medication regimens is most appropriate?

Begin labetalol monotherapy immediately to control both alpha and beta adrenergic effects
Begin phenoxybenzamine first; add a beta-blocker only after adequate alpha blockade is achieved (Correct answer)
Begin doxazosin and metoprolol simultaneously to achieve rapid combined blockade
Begin high-dose amlodipine alone, reserving alpha-blockade for intraoperative use

Correct answer: Begin phenoxybenzamine first; add a beta-blocker only after adequate alpha blockade is achieved

Preoperative preparation for pheochromocytoma requires alpha-adrenergic blockade FIRST with a non-selective irreversible agent (phenoxybenzamine) for at least 10–14 days before surgery. Beta-blockers are added ONLY after adequate alpha blockade to prevent unopposed alpha stimulation, which could precipitate hypertensive crisis. Labetalol has weak alpha-blocking activity insufficient for pheochromocytoma preparation. Starting a beta-blocker simultaneously or before alpha blockade is potentially dangerous. Calcium channel blockers may be used adjunctively but are not first-line.

Question 105: Which dermatophyte is most commonly responsible for tinea capitis in the United States?

Trichophyton rubrum
Microsporum canis
Epidermophyton floccosum
Trichophyton tonsurans (Correct answer)

Correct answer: Trichophyton tonsurans

Trichophyton tonsurans is the most common cause of tinea capitis in the United States, typically not fluorescing under Wood's lamp.

Question 106: Which antidote is used for acetaminophen overdose and when should it be administered?

N-acetylcysteine (NAC) based on Rumack-Matthew nomogram (Correct answer)
Flumazenil within 4 hours
Sodium bicarbonate for all cases
Activated charcoal only if within 1 hour

Correct answer: N-acetylcysteine (NAC) based on Rumack-Matthew nomogram

N-acetylcysteine is the antidote for acetaminophen toxicity; the Rumack-Matthew nomogram determines treatment thresholds based on serum level and time since ingestion.

Question 107: In the ABCDE criteria for evaluating suspicious skin lesions for melanoma, what does the 'E' stand for?

Extent of erythema
Elevation above surrounding skin
Exudate from the lesion
Evolution or change over time (Correct answer)

Correct answer: Evolution or change over time

In the ABCDE criteria (Asymmetry, Border, Color, Diameter, Evolution), 'E' stands for Evolution—any change in size, shape, color, or symptoms such as bleeding over time.

Question 108: A physician failed the SPEX and asks the FSMB directly how long they must wait before retaking it. Which response is most accurate?

A failed first attempt triggers automatic referral to a formal clinical competency assessment program before a retake is allowed
There is no waiting period; the physician may retake the SPEX immediately at any Prometric center
Waiting period and retake conditions are set by the ordering state medical board, not uniformly by the FSMB (Correct answer)
The FSMB mandates a universal 90-day waiting period between all SPEX attempts

Correct answer: Waiting period and retake conditions are set by the ordering state medical board, not uniformly by the FSMB

There is no single universal FSMB-mandated waiting period for SPEX retakes. Because the examination is ordered and controlled by the individual state medical board, retake eligibility — including waiting periods and any additional requirements — is determined by that board's own policies. This creates variation across jurisdictions that candidates must verify with their specific board.

Question 109: A 70-year-old patient develops sudden-onset severe abdominal pain, bloody diarrhea, and has atrial fibrillation. CT shows pneumatosis intestinalis and portal venous gas. What is the diagnosis?

Acute mesenteric ischemia with bowel infarction (Correct answer)
Diverticular hemorrhage
Infectious colitis
Ischemic colitis

Correct answer: Acute mesenteric ischemia with bowel infarction

Pneumatosis intestinalis and portal venous gas on CT in a patient with A-fib and acute abdominal pain indicate advanced acute mesenteric ischemia with intestinal infarction, requiring emergency surgery.

Question 110: Which of the following best describes the mechanism of action of lithium in bipolar disorder?

Inhibition of inositol monophosphatase disrupting PI signaling (Correct answer)
Serotonin 5-HT1A agonism
GABA-B receptor agonism
Dopamine D2 receptor blockade

Correct answer: Inhibition of inositol monophosphatase disrupting PI signaling

Lithium inhibits inositol monophosphatase and GSK-3β, disrupting phosphatidylinositol signaling cascades implicated in its mood-stabilizing effects.

Question 111: Nikolsky's sign, in which the epidermis separates with lateral pressure, is characteristically positive in which blistering disorder?

Dermatitis herpetiformis
Pemphigus vulgaris (Correct answer)
Bullous pemphigoid
Epidermolysis bullosa acquisita

Correct answer: Pemphigus vulgaris

Nikolsky's sign is positive in pemphigus vulgaris because intraepidermal acantholysis from anti-desmoglein antibodies allows lateral pressure to separate the superficial epidermis from deeper layers.

Question 112: An outbreak investigation reveals that 40 of 200 attendees at a catered banquet developed gastrointestinal illness. The attack rate among those who ate shrimp was 55%, while the attack rate among those who did not eat shrimp was 15%. What is the attributable risk percent (AR%) among the exposed?

72.7% (Correct answer)
27.3%
40.0%
85.0%

Correct answer: 72.7%

AR% among the exposed = (Risk in exposed − Risk in unexposed) / Risk in exposed × 100 = (0.55 − 0.15) / 0.55 × 100 = 0.40 / 0.55 × 100 ≈ 72.7%. This means approximately 73% of illness among shrimp eaters is attributable to shrimp consumption, assuming causality — distinguishing it from relative risk or absolute risk difference alone.

Question 113: Which of the following is the preferred treatment for onychomycosis caused by Trichophyton rubrum?

Oral fluconazole for 4 weeks
Oral terbinafine for 12 weeks (Correct answer)
Topical ciclopirox for 48 weeks
Topical clotrimazole for 4 weeks

Correct answer: Oral terbinafine for 12 weeks

Oral terbinafine for 12 weeks is the first-line treatment for toenail onychomycosis due to its superior mycological cure rates against dermatophytes.

Question 114: A 2-year-old presents with bloody diarrhea, abdominal pain, and pallor. Labs show microangiopathic hemolytic anemia, thrombocytopenia, and elevated creatinine. Which organism most commonly causes this condition?

Clostridium difficile
Shiga toxin-producing E. coli (STEC O157:H7) (Correct answer)
Salmonella typhi
Campylobacter jejuni

Correct answer: Shiga toxin-producing E. coli (STEC O157:H7)

Hemolytic uremic syndrome (HUS) is most commonly caused by Shiga toxin-producing E. coli, especially O157:H7, often acquired from undercooked beef.

Question 115: Which professional attribute is most valued in family medicine within the SPEX field?

Accountability and commitment to standards (Correct answer)
Prioritizing personal convenience
Working in isolation
Avoiding challenging situations

Correct answer: Accountability and commitment to standards

Accountability and commitment to professional standards build trust and ensure consistent, high-quality practice.

Question 116: A physician wishes to take the SPEX to proactively demonstrate competency before their state board requires it. Which of the following most accurately describes whether this is permissible under FSMB policy?

It is not permissible unless the physician's national credentials are verified through the FCVS first
It is not permissible; the SPEX must be formally ordered by the physician's state medical board — physicians cannot self-initiate access (Correct answer)
It is permissible; physicians may self-register through the FSMB online portal after paying the examination fee
It is permissible only if the physician has been out of clinical practice for fewer than 2 years

Correct answer: It is not permissible; the SPEX must be formally ordered by the physician's state medical board — physicians cannot self-initiate access

The SPEX is not a self-initiated examination. It must be formally ordered by the state medical board on behalf of the physician. This distinguishes it from the USMLE and other licensing exams where candidates register directly. Physicians cannot self-refer to take the SPEX regardless of their motivation.

Question 117: Which cytochrome P450 enzyme is primarily responsible for metabolizing warfarin and many other drugs?

CYP1A2
CYP3A4
CYP2D6
CYP2C9 (Correct answer)

Correct answer: CYP2C9

CYP2C9 is the primary enzyme responsible for S-warfarin metabolism, and its inhibition or induction significantly affects INR.

Question 118: A 41-year-old woman undergoes a hysteroscopic myomectomy for a 4 cm submucosal fibroid. The procedure takes 90 minutes with 6 liters of 1.5% glycine distension medium used and 5.2 liters recovered. Postoperatively she develops nausea, headache, and confusion. Serum sodium returns at 118 mEq/L. What is the most serious potential complication directly attributable to the glycine specifically (as opposed to another hypotonic medium)?

Hyponatremic encephalopathy from fluid absorption
Hyperammonemia from glycine metabolism (Correct answer)
Intravascular hemolysis due to hypotonic lysis
Transient visual disturbances from direct retinal toxicity

Correct answer: Hyperammonemia from glycine metabolism

While hyponatremia (answer B) can occur with any hypotonic medium, glycine is specifically metabolized to ammonia via glycine decarboxylase, which can cause hyperammonemic encephalopathy independent of the sodium level. This is unique to glycine-containing media and can be fatal if unrecognized. Transient visual disturbances (scotomata) can also occur with glycine due to its inhibitory neurotransmitter properties, but hyperammonemia represents the most serious and glycine-specific risk. Hemolysis is more characteristic of sterile water as distension medium. The question specifically asks what is attributable to glycine itself.

Question 119: What is the value of continuing education in neurology for SPEX professionals?

It replaces workplace experience
It keeps professionals current with evolving standards and practices (Correct answer)
It is primarily a social activity
It is only needed for recertification

Correct answer: It keeps professionals current with evolving standards and practices

Continuing education ensures professionals stay current with the latest developments, standards, and best practices in their field.

Question 120: A 55-year-old postmenopausal woman with a pelvic mass has a CA-125 of 850 U/mL, ascites, and a solid-cystic ovarian mass on imaging. What is the most likely diagnosis?

Epithelial ovarian carcinoma (Correct answer)
Uterine leiomyoma
Endometrioma
Benign serous cystadenoma

Correct answer: Epithelial ovarian carcinoma

Postmenopausal solid-cystic ovarian mass with markedly elevated CA-125 and ascites is highly suspicious for epithelial ovarian carcinoma.

Question 121: A 45-year-old man presents with ascending weakness reaching the thighs over 4 days following a Campylobacter jejuni gastroenteritis 3 weeks prior. CSF shows albuminocytologic dissociation. Nerve conduction studies reveal prolonged distal motor latencies, reduced CMAP amplitudes, absent F-waves, and normal SNAP amplitudes. Which antibody is MOST specifically associated with the severe axonal variant of this condition that correlates with this organism?

Anti-MAG IgM
Anti-GM1 and anti-GD1a IgG (Correct answer)
Anti-GD1b IgG
Anti-GQ1b IgG

Correct answer: Anti-GM1 and anti-GD1a IgG

C. jejuni infection is the most common identifiable antecedent of Guillain-Barré syndrome. The axonal variant (AMAN — Acute Motor Axonal Neuropathy) is strongly associated with anti-GM1 and anti-GD1a IgG antibodies through molecular mimicry with C. jejuni lipooligosaccharide. Anti-GQ1b is associated with Miller Fisher syndrome (ophthalmoplegia, ataxia, areflexia). Anti-GD1b correlates with sensory ataxic GBS. Anti-MAG is associated with IgM paraproteinemic neuropathy.

Question 122: On a Tc-99m bone scan, a 'superscan' pattern is characterized by:

Focal cold defects replacing normal marrow activity
Unilateral increased uptake confined to one limb
Multiple discrete hot spots corresponding to known metastatic sites
Diffusely increased skeletal uptake with absent or faint renal activity (Correct answer)

Correct answer: Diffusely increased skeletal uptake with absent or faint renal activity

A superscan reflects diffuse bony metastatic disease (or metabolic bone disease) with such avid skeletal uptake that the kidneys appear faint or absent.

Question 123: Which ECG finding in a patient with chest pain indicates immediate catheterization lab activation, even without ST elevation?

Prolonged QTc
Sinus tachycardia
Right axis deviation
Left bundle branch block (new or presumed new) (Correct answer)

Correct answer: Left bundle branch block (new or presumed new)

New or presumed new LBBB in the setting of chest pain is a STEMI-equivalent and warrants immediate cath lab activation per ACC/AHA guidelines.

Question 124: The phenomenon where skin trauma induces new disease lesions at injury sites in conditions like psoriasis and lichen planus is called:

Koebner phenomenon (Correct answer)
Pathergy
Dermographism
Nikolsky sign

Correct answer: Koebner phenomenon

The Koebner phenomenon (isomorphic response) describes the appearance of new disease lesions at sites of cutaneous trauma, occurring in psoriasis, lichen planus, vitiligo, and other conditions.

Question 125: What is the value of continuing education in obstetrics and gynecology for SPEX professionals?

It keeps professionals current with evolving standards and practices (Correct answer)
It is only needed for recertification
It replaces workplace experience
It is primarily a social activity

Correct answer: It keeps professionals current with evolving standards and practices

Continuing education ensures professionals stay current with the latest developments, standards, and best practices in their field.

Question 126: Which skin cancer has the highest mortality rate despite representing a smaller percentage of all skin cancer cases?

Merkel cell carcinoma
Melanoma (Correct answer)
Squamous cell carcinoma
Basal cell carcinoma

Correct answer: Melanoma

Melanoma accounts for the majority of skin cancer deaths due to its high metastatic potential, despite being less common than basal cell and squamous cell carcinomas.

Question 127: A 68-year-old man with major depressive disorder fails to respond to two adequate SSRI trials. Which of the following is a reasonable augmentation strategy with strong evidence?

Adding lithium to the existing antidepressant (Correct answer)
Switching to a tricyclic antidepressant monotherapy
Adding haloperidol 5 mg/day
Adding benzodiazepine monotherapy

Correct answer: Adding lithium to the existing antidepressant

Lithium augmentation of antidepressants has strong evidence for treatment-resistant depression, converting partial responders or non-responders to full response.

Question 128: Which immunofluorescence pattern is characteristic of pemphigus vulgaris?

Linear IgG at the dermal-epidermal junction
C3 deposits at the basement membrane zone
Intercellular IgG in a 'fishnet' pattern (Correct answer)
Granular IgA at dermal papillae tips

Correct answer: Intercellular IgG in a 'fishnet' pattern

Pemphigus vulgaris shows intercellular IgG deposition in a 'fishnet' or 'chicken wire' pattern on direct immunofluorescence due to anti-desmoglein antibodies.

Question 129: In evaluating a new occupational health screening program, an investigator notes that employees found to have early-stage disease through screening appear to survive longer than historical controls diagnosed after symptom onset — even though no effective treatment exists for the condition. This observation MOST likely reflects which bias?

Lead-time bias (Correct answer)
Length-biased sampling
Recall bias
Hawthorne effect

Correct answer: Lead-time bias

Lead-time bias occurs when screening detects disease earlier in its natural history, advancing the time of diagnosis without altering the biological course or time of death. Survival appears longer because the clock starts earlier, not because the patient lives longer. Length-biased sampling (a related but distinct concept) refers to screening preferentially detecting slower-progressing, less aggressive disease — but the key signal here (no effective treatment yet longer apparent survival) most directly implicates lead-time bias.

Question 130: A SPEX certified reference material for soil digestion quality control has a certified total chromium (Cr) value of 45.2 ± 2.1 mg/kg (95% CI, k=2). A laboratory performing EPA Method 3050B acid digestion followed by ICP-OES consistently recovers 38–40 mg/kg across five independent digestions. The laboratory's ICP-OES calibration is verified daily and shows 99–101% recovery for aqueous SPEX CRM check standards. What is the MOST likely explanation for the systematic low recovery?

The ICP-OES is suffering from spectral interference on the Cr 267.716 nm line from iron (Fe) emission lines present in the soil matrix
The SPEX CRM certified value includes chromium in refractory spinel phases (FeCr₂O₄) that are not dissolved by 3050B, and the recovery difference represents the method's known incomplete extraction of these phases (Correct answer)
The EPA 3050B open-vessel acid digestion procedure does not dissolve silicate-bound chromium, which is a common chromium speciation in soils; a total dissolution method (e.g., lithium metaborate fusion) would be needed for quantitative recovery
Chromium (VI) present in the soil is being reduced to Cr(III) during the nitric-perchloric acid digestion, and Cr(III) forms insoluble Cr₂O₃ precipitates at elevated temperature

Correct answer: The SPEX CRM certified value includes chromium in refractory spinel phases (FeCr₂O₄) that are not dissolved by 3050B, and the recovery difference represents the method's known incomplete extraction of these phases

EPA Method 3050B is an acid dissolution technique (nitric/hydrochloric acid reflux), not a total digestion. The method itself acknowledges that refractory mineral phases—including chromite spinel (FeCr₂O₄) and other silicate-bound metals—are not quantitatively dissolved. The certified value on a SPEX soil CRM often represents the 'total' or 'aqua regia recoverable' fraction certified to reflect what the stated method is expected to recover, but if the CRM's certified value is based on a total fusion technique while the lab uses 3050B, systematic low recovery of refractory Cr phases is expected and methodologically valid. The 84–88% recovery is characteristic of 3050B performance on Cr in real soil matrices. ICP-OES Fe interference on Cr is managed by wavelength selection and would not cause a systematic 12–16% deficit.

Question 131: What is the value of continuing education in family medicine for SPEX professionals?

It keeps professionals current with evolving standards and practices (Correct answer)
It replaces workplace experience
It is only needed for recertification
It is primarily a social activity

Correct answer: It keeps professionals current with evolving standards and practices

Continuing education ensures professionals stay current with the latest developments, standards, and best practices in their field.

Question 132: A patient with MS develops a painful, unilateral loss of vision with an afferent pupillary defect. What is the most likely diagnosis?

Retinal detachment
Acute angle-closure glaucoma
Optic neuritis (Correct answer)
Central retinal artery occlusion

Correct answer: Optic neuritis

Optic neuritis causes painful vision loss and a relative afferent pupillary defect (RAPD), and is strongly associated with MS.

Question 133: Which of the following best describes the hierarchy of controls for occupational hazards, from most to least preferred?

Administrative → engineering → PPE → substitution → elimination
PPE → administrative → engineering → substitution → elimination
Elimination → substitution → engineering → administrative → PPE (Correct answer)
Engineering → elimination → substitution → PPE → administrative

Correct answer: Elimination → substitution → engineering → administrative → PPE

The hierarchy prioritizes elimination, then substitution, engineering controls, administrative controls, and PPE last.

Question 134: A patient presents with asymmetric limb weakness, tongue fasciculations, hyperreflexia, and dysarthria. Which disease is most likely?

Multiple sclerosis
Cervical myelopathy
Amyotrophic lateral sclerosis (Correct answer)
Spinal muscular atrophy

Correct answer: Amyotrophic lateral sclerosis

ALS involves simultaneous upper (hyperreflexia) and lower (fasciculations, atrophy) motor neuron degeneration without sensory loss.

Question 135: A patient with known epilepsy presents with continuous seizure activity lasting 30 minutes. What is the first-line treatment?

Levetiracetam IV
Phenytoin IV
Lorazepam IV (Correct answer)
Phenobarbital IV

Correct answer: Lorazepam IV

Benzodiazepines such as lorazepam are first-line for status epilepticus because of rapid onset and efficacy in terminating seizures.

Question 136: At what age should a healthy infant be able to sit without support?

9 months
6 months (Correct answer)
3 months
12 months

Correct answer: 6 months

Most infants achieve sitting without support by 6 months of age as a gross motor milestone.

Question 137: Which subtype of melanoma carries the worst prognosis due to its rapid vertical growth phase without a preceding radial growth phase?

Acral lentiginous melanoma
Lentigo maligna melanoma
Superficial spreading melanoma
Nodular melanoma (Correct answer)

Correct answer: Nodular melanoma

Nodular melanoma has the worst prognosis because it grows vertically from the outset without a radial growth phase, resulting in greater depth of invasion at diagnosis and higher rates of metastasis.

Question 138: A 45-year-old woman presents with recurrent episodes of painful, erythematous nodules on her shins that resolve with bruise-like hyperpigmentation over 2–6 weeks. A biopsy from the center of a fresh lesion shows a septal panniculitis without vasculitis. Workup reveals elevated ACE levels and bilateral hilar adenopathy on chest X-ray. What is the most appropriate next step in management?

Start hydroxychloroquine for cutaneous sarcoidosis
Reassurance and NSAIDs; no systemic treatment needed for this benign, self-limited manifestation (Correct answer)
Perform transbronchial biopsy to confirm sarcoidosis before any treatment
Initiate systemic corticosteroids immediately for pulmonary sarcoidosis

Correct answer: Reassurance and NSAIDs; no systemic treatment needed for this benign, self-limited manifestation

This presentation describes Löfgren syndrome — the triad of erythema nodosum, bilateral hilar lymphadenopathy, and periarthritis/arthritis, which is an acute presentation of sarcoidosis. Erythema nodosum in Löfgren syndrome is a reactive, immunologically mediated phenomenon, not true cutaneous sarcoidosis. It carries an excellent prognosis with >90% spontaneous resolution within 2 years. NSAIDs and rest are first-line; systemic corticosteroids are not routinely indicated for this benign variant. Biopsy of erythema nodosum in this context is not diagnostic of sarcoidosis (it shows nonspecific septal panniculitis).

Question 139: A psychiatrist is treating a 45-year-old woman with treatment-resistant MDD who has failed four adequate antidepressant trials. She has no history of mania or hypomania. The clinician is considering augmentation strategies. Which of the following statements about lithium augmentation in treatment-resistant unipolar depression is most accurate?

Lithium augmentation is rarely effective in unipolar depression and should only be used after exhausting all atypical antipsychotic augmentation options
Lithium augmentation is contraindicated in unipolar depression because it significantly increases the risk of converting the patient to bipolar disorder
Lithium augmentation has the strongest historical evidence base among augmentation strategies for treatment-resistant unipolar MDD, with response typically seen within 2–6 weeks (Correct answer)
Lithium augmentation requires achieving serum levels above 1.2 mEq/L to achieve antidepressant effect in unipolar depression

Correct answer: Lithium augmentation has the strongest historical evidence base among augmentation strategies for treatment-resistant unipolar MDD, with response typically seen within 2–6 weeks

Lithium augmentation of antidepressants in treatment-resistant unipolar MDD has one of the longest evidence bases of any augmentation strategy, with response rates of 40–60% in early studies. It typically requires 2–6 weeks to see response at therapeutic levels (0.6–0.9 mEq/L for augmentation — not necessarily the higher mood stabilizer levels). While atypical antipsychotic augmentation has more recent RCT data and is widely used, lithium augmentation remains a guideline-supported, evidence-based option and should not be considered a last resort. Lithium does not 'convert' patients to bipolar disorder. The antidepressant augmentation target level is generally 0.6–0.9 mEq/L, not above 1.2 mEq/L (which raises toxicity risk).

Question 140: A physician fails the SPEX and wants to understand their retake options. Which of the following most accurately reflects FSMB policy regarding repeat attempts?

Candidates are permitted exactly two retakes; a third failure results in permanent SPEX ineligibility.
Candidates may retake the SPEX after a 90-day waiting period, with individual states potentially imposing additional restrictions on the total number of allowable attempts. (Correct answer)
A failed SPEX cannot be retaken; the candidate must instead complete a 12-month clinical reentry program.
There is no limit on retakes, but candidates must wait 6 months between each attempt.

Correct answer: Candidates may retake the SPEX after a 90-day waiting period, with individual states potentially imposing additional restrictions on the total number of allowable attempts.

The FSMB requires a minimum waiting period of 90 days between SPEX attempts. There is no absolute universal cap on total attempts imposed by the FSMB itself; however, individual state medical boards may impose their own limits on the number of times a candidate may sit for the SPEX as part of their licensure reinstatement process. Candidates should always verify their specific state's requirements, as board-level restrictions vary significantly.

Question 141: A 66-year-old man develops acute gout. His renal function is impaired (GFR 25 mL/min). Which agent is most appropriate to treat the acute attack?

High-dose NSAIDs
Colchicine at standard doses
Allopurinol
Low-dose colchicine or corticosteroids (Correct answer)

Correct answer: Low-dose colchicine or corticosteroids

In patients with renal impairment, low-dose colchicine or corticosteroids are preferred because NSAIDs and standard colchicine dosing carry significant toxicity risks.

Question 142: A 67-year-old man with type 2 diabetes, CKD stage 3b (eGFR 38 mL/min/1.73 m²), and heart failure with reduced ejection fraction (EF 32%) presents for medication reconciliation. His HbA1c is 8.1%. He is currently on metformin 500 mg twice daily, insulin glargine, and empagliflozin 10 mg daily. Which statement best reflects the current evidence-based approach to his empagliflozin therapy?

Empagliflozin should be discontinued because its glycemic efficacy is negligible below eGFR 45
Empagliflozin should be continued for its cardiovascular and renal protective effects regardless of glycemic contribution (Correct answer)
Empagliflozin is contraindicated at eGFR <40 and must be stopped immediately
Empagliflozin should be dose-reduced to 5 mg daily to mitigate DKA risk at this eGFR

Correct answer: Empagliflozin should be continued for its cardiovascular and renal protective effects regardless of glycemic contribution

SGLT2 inhibitors like empagliflozin have cardiorenal protective effects (reduced HFrEF hospitalization, reduced CKD progression) that are independent of glycemic lowering and persist even at reduced eGFR. Current guidelines (ADA, KDIGO, ACC/AHA) recommend continuing SGLT2 inhibitors for cardioprotection and nephroprotection down to eGFR ≥20 mL/min/1.73 m², even though glycemic efficacy is diminished. The prior contraindication threshold of eGFR <45 applied only to glycemic benefit, not to organ-protective indications.

Question 143: Which counseling statement about metronidazole (Flagyl) is most important to include?

May be taken during the first trimester of pregnancy without concern
Refrigerate all dosage forms to maintain potency
Take with antacids to improve absorption
Avoid alcohol during therapy and for 48 hours after the last dose (Correct answer)

Correct answer: Avoid alcohol during therapy and for 48 hours after the last dose

Metronidazole inhibits aldehyde dehydrogenase, causing a disulfiram-like reaction (flushing, nausea, vomiting) if alcohol is consumed during or shortly after therapy.

Question 144: A 70-year-old man develops sudden inability to speak but can understand language perfectly. Which aphasia does he have?

Broca aphasia (Correct answer)
Wernicke aphasia
Conduction aphasia
Global aphasia

Correct answer: Broca aphasia

Broca aphasia is a non-fluent aphasia with intact comprehension, caused by lesions in the left inferior frontal gyrus.

Question 145: A 45-year-old man with treatment-resistant OCD has failed three adequate SSRI trials at maximum doses. He is currently on fluvoxamine 300 mg/day with partial response. His psychiatrist considers augmentation. Which of the following augmentation strategies has the BEST evidence base for treatment-resistant OCD?

Buspirone
Low-dose risperidone (Correct answer)
Clonazepam
Lithium

Correct answer: Low-dose risperidone

Low-dose antipsychotic augmentation, particularly with risperidone (0.5–2 mg/day), has the strongest evidence for SSRI-refractory OCD in multiple randomized controlled trials and is endorsed by treatment guidelines. The mechanism may involve combined serotonin and dopamine modulation. Clonazepam has limited and inconsistent evidence. Buspirone showed early promise but has not replicated well in controlled trials. Lithium augmentation lacks consistent evidence in OCD and is better established in major depressive disorder.

Question 146: Which approach best demonstrates mastery of obstetrics and gynecology in SPEX practice?

Relying entirely on technology
Following procedures without understanding
Avoiding complex scenarios
Applying principles to novel situations with sound judgment (Correct answer)

Correct answer: Applying principles to novel situations with sound judgment

True mastery involves understanding underlying principles well enough to apply them to new and unfamiliar situations with professional judgment.

Question 147: Which counseling point is most important for a patient newly prescribed methotrexate for rheumatoid arthritis?

Avoid all physical activity during therapy
Take on an empty stomach for best absorption
Take folic acid supplementation to reduce toxicity risk, and avoid alcohol (Correct answer)
Use antacids 2 hours before each dose

Correct answer: Take folic acid supplementation to reduce toxicity risk, and avoid alcohol

Folic acid supplementation reduces methotrexate-associated toxicities (mucositis, hepatotoxicity), and alcohol must be avoided due to additive hepatotoxicity.

Question 148: A 72-year-old man develops acute confusion, visual hallucinations, and fluctuating level of consciousness 2 days after hip surgery. He has no prior psychiatric history. What is the most likely diagnosis?

New-onset schizophrenia
Delirium (Correct answer)
Dementia with Lewy bodies
Brief psychotic disorder

Correct answer: Delirium

Postoperative delirium is common in elderly patients and is characterized by acute onset, fluctuating course, and often visual hallucinations.

Question 149: Which measure of association is used in a case-control study when disease is rare?

Incidence rate ratio
Odds ratio (Correct answer)
Prevalence ratio
Relative risk (risk ratio)

Correct answer: Odds ratio

Case-control studies cannot directly calculate risk; the odds ratio approximates the relative risk when disease prevalence is low (<10%).

Question 150: A 30-year-old woman presents with a painful red eye, photophobia, and excessive tearing. She wears contact lenses daily and reports sleeping in them. Slit-lamp examination reveals a central corneal ulcer with mucopurulent discharge. The most appropriate initial management is:

Oral acyclovir empirically for presumed HSV keratitis
Topical corticosteroids to reduce inflammation
Saline irrigation and patching of the eye
Immediate referral to ophthalmology and discontinuation of contact lens wear (Correct answer)

Correct answer: Immediate referral to ophthalmology and discontinuation of contact lens wear

A contact lens wearer with a painful red eye and central corneal ulcer has a microbial keratitis (bacterial, often Pseudomonas aeruginosa) until proven otherwise. This is a vision-threatening emergency requiring urgent ophthalmology referral, corneal culture, and intensive topical antibiotics (fluoroquinolone). Contact lenses must be removed immediately. Topical steroids can worsen bacterial or fungal ulcers. Patching is contraindicated in bacterial ulcers. Oral acyclovir is for systemic HSV, not contact lens keratitis.

Question 151: What is the first-line treatment for uncomplicated scabies in adults?

Oral doxycycline
Topical permethrin 5% cream (Correct answer)
Oral ivermectin
Topical lindane 1%

Correct answer: Topical permethrin 5% cream

Topical permethrin 5% cream is the first-line treatment for scabies, applied to the entire body from the neck down and left for 8-14 hours; oral ivermectin is an alternative for cases where topical treatment is impractical.

Question 152: A 70-year-old man presents with 3 weeks of painless gross hematuria. He is a former smoker. Urinalysis confirms hematuria without casts or proteinuria. The most important next diagnostic step is:

PSA level and DRE
Cystoscopy and upper tract imaging (CT urogram) (Correct answer)
Repeat urinalysis in 6 weeks before further workup
Urine culture and a course of antibiotics empirically

Correct answer: Cystoscopy and upper tract imaging (CT urogram)

Painless gross hematuria in a patient over 35, especially a smoker, must be presumed malignant until proven otherwise. Bladder cancer (the most common urologic malignancy in older adults) classically presents with painless gross hematuria. The gold standard evaluation is cystoscopy (to directly visualize the bladder) plus upper tract imaging (CT urogram) to evaluate the kidneys and ureters. Watchful waiting risks missing early-stage cancer. Empiric antibiotics are inappropriate without evidence of infection. PSA/DRE address prostate, not hematuria etiology.

Question 153: An 8-year-old boy with known atopic dermatitis is started on dupilumab. Four weeks later, his parents report new-onset conjunctivitis that has not responded to topical antibiotics. Which mechanism best explains this complication?

Type III hypersensitivity reaction from circulating immune complexes depositing in conjunctival vessels
IL-4 and IL-13 blockade disrupting conjunctival goblet cell homeostasis and altering the ocular surface microbiome (Correct answer)
Immunosuppression leading to opportunistic ocular infection with Pseudomonas aeruginosa
Cross-reactivity of dupilumab with corneal IL-4 receptors causing direct cytotoxic injury

Correct answer: IL-4 and IL-13 blockade disrupting conjunctival goblet cell homeostasis and altering the ocular surface microbiome

Dupilumab-associated conjunctivitis is one of the most common adverse effects of this IL-4Rα antagonist, occurring in up to 10-28% of patients. The mechanism is not infectious. IL-4 and IL-13 signaling plays a role in maintaining conjunctival goblet cell density and mucin production. Blockade disrupts the normal ocular surface immune homeostasis and the balance of commensal organisms, leading to a non-infectious conjunctivitis. It does not respond to antibiotics, topical steroids are sometimes used, and dose adjustment or ophthalmology referral may be needed. This is a distinctly pharmacological adverse effect unique to this biologic class.

Question 154: A 61-year-old man with type 2 diabetes, stage 3b CKD (eGFR 38 mL/min/1.73m²), and a recent hospitalization for acute decompensated heart failure is being optimized for outpatient management. Which of the following medication adjustments is MOST evidence-based given his combined comorbidities?

Initiate a GLP-1 receptor agonist as primary therapy given its established cardiac benefit and renal safety
Avoid all oral glucose-lowering agents and transition to insulin-based therapy
Discontinue metformin due to CKD and initiate a DPP-4 inhibitor as primary glucose-lowering agent
Add an SGLT-2 inhibitor (empagliflozin or dapagliflozin) despite reduced glucose-lowering efficacy at this eGFR level (Correct answer)

Correct answer: Add an SGLT-2 inhibitor (empagliflozin or dapagliflozin) despite reduced glucose-lowering efficacy at this eGFR level

SGLT-2 inhibitors (empagliflozin, dapagliflozin) have robust evidence for reducing heart failure hospitalizations and slowing CKD progression independent of their glucose-lowering effect, which diminishes at eGFR < 45. Current guidelines (ADA, ESC) support SGLT-2 inhibitor use down to eGFR 20–25 mL/min for cardiorenal protection — not glucose control. In a patient with recent HF hospitalization and CKD 3b, the cardiorenal benefit justifies use. Metformin can be continued cautiously down to eGFR 30 in many guidelines. GLP-1 agonists have cardiac benefit but less direct HF impact. SGLT-2 inhibitors represent the strongest evidence-based choice here.

Question 155: A 48-year-old woman presents with bilateral wrist pain, morning stiffness lasting over 1 hour, and symmetric joint swelling. RF and anti-CCP are positive. What is the recommended first-line disease-modifying therapy?

Leflunomide
Hydroxychloroquine
Sulfasalazine
Methotrexate (Correct answer)

Correct answer: Methotrexate

Methotrexate is the anchor DMARD for rheumatoid arthritis and the preferred first-line agent due to its efficacy and cost-effectiveness.

Question 156: Which medication used for acne treatment is absolutely contraindicated in pregnancy due to teratogenicity?

Oral isotretinoin (Correct answer)
Topical clindamycin
Topical benzoyl peroxide
Oral doxycycline

Correct answer: Oral isotretinoin

Oral isotretinoin is a Category X teratogen causing severe birth defects and requires enrollment in the iPLEDGE program for all patients.

Question 157: A 50-year-old man with hypertension and gout presents with a serum uric acid of 9.2 mg/dL. He has had 3 gout attacks in the past year. Which medication is most appropriate for urate-lowering therapy?

Indomethacin
Colchicine
Probenecid
Allopurinol (Correct answer)

Correct answer: Allopurinol

Allopurinol is the first-line urate-lowering therapy for chronic gout, targeting a serum urate below 6 mg/dL.

Question 158: A 45-year-old woman presents with subacute ascending weakness over 3 weeks, areflexia, autonomic instability, and CSF showing albuminocytologic dissociation. Nerve conduction studies reveal prolonged distal latencies, conduction block, and markedly slowed velocities in motor nerves. Anti-ganglioside antibody panel shows strong positivity for anti-GQ1b IgG. Which variant of Guillain-Barré syndrome does this antibody profile MOST specifically indicate?

Pharyngeal-cervical-brachial variant
Acute motor axonal neuropathy (AMAN)
Miller Fisher syndrome / Bickerstaff brainstem encephalitis overlap (Correct answer)
Acute inflammatory demyelinating polyneuropathy (AIDP)

Correct answer: Miller Fisher syndrome / Bickerstaff brainstem encephalitis overlap

Anti-GQ1b IgG antibodies are highly specific (>85%) for Miller Fisher syndrome (MFS), characterized by the triad of ophthalmoplegia, ataxia, and areflexia, and its brainstem-predominant overlap, Bickerstaff brainstem encephalitis. GQ1b ganglioside is abundantly expressed at paranodal myelin of oculomotor nerves and muscle spindles. AMAN is associated with anti-GM1/GD1a antibodies, while AIDP typically lacks specific anti-ganglioside antibodies.

Question 159: A 13-year-old female with anorexia nervosa (BMI 14.5 kg/m²) is admitted for medical stabilization and begins cautious refeeding. On day 3, she develops profound weakness, paresthesias, and a new cardiac arrhythmia. Her labs show phosphate 1.1 mg/dL, magnesium 1.4 mg/dL, and potassium 3.0 mEq/L. Which intervention is the highest priority to address the root cause of her acute decompensation?

Magnesium sulfate infusion to correct hypomagnesemia before addressing other electrolytes
Intravenous potassium chloride replacement targeting K⁺ > 3.5 mEq/L
Intravenous phosphate replacement, as refeeding syndrome-driven hypophosphatemia is the primary driver (Correct answer)
Temporary cessation of all enteral feeds and return to pre-admission caloric intake

Correct answer: Intravenous phosphate replacement, as refeeding syndrome-driven hypophosphatemia is the primary driver

This presentation is classic refeeding syndrome. Reintroduction of carbohydrates triggers insulin release, driving phosphate, potassium, and magnesium intracellularly. Hypophosphatemia is the hallmark and most dangerous derangement — phosphate at 1.1 mg/dL is critically low. Phosphate is required for ATP synthesis and 2,3-DPG production; its depletion causes muscle weakness, cardiac dysfunction (arrhythmias, heart failure), and neurological symptoms. While all electrolytes need correction, IV phosphate replacement is the highest priority as hypomagnesemia impairs PTH response and worsens hypophosphatemia — but the primary driver of the acute decompensation is the phosphate deficit. Feeding should be reduced (not stopped entirely) and resumed at a lower caloric density.

Question 160: A 38-year-old G0 undergoes IVF. After embryo transfer she develops severe abdominal distension, shortness of breath, and oliguria. Her estradiol was 4,800 pg/mL at trigger. What is the most likely complication?

Ectopic pregnancy
Ovarian torsion
Ovarian hyperstimulation syndrome (OHSS) (Correct answer)
Pulmonary embolism

Correct answer: Ovarian hyperstimulation syndrome (OHSS)

Severe OHSS presents with massive ovarian enlargement, ascites, pleural effusion, and oliguria following ovarian stimulation, especially with very high estradiol levels.

Question 161: A 34-year-old woman with a history of inflammatory bowel disease presents with rapidly expanding, painful ulcerations with undermined violaceous borders on her bilateral shins following minor trauma from shaving. She is afebrile, and wound cultures are negative. Histopathology shows a neutrophilic infiltrate without vasculitis. Which pathophysiologic mechanism BEST explains why surgical debridement would worsen this condition?

Koebner phenomenon causing new lesions at sites of trauma
Pathergy leading to accelerated neutrophilic inflammation at wound sites (Correct answer)
Bacterial superinfection potentiated by disrupted skin barrier
Suppression of fibroblast activity by circulating cytokines

Correct answer: Pathergy leading to accelerated neutrophilic inflammation at wound sites

This patient has pyoderma gangrenosum (PG), a neutrophilic dermatosis associated with IBD. PG classically demonstrates pathergy — an exaggerated, aberrant wound-healing response in which minor trauma (including surgical debridement) triggers a disproportionate neutrophilic inflammatory cascade, causing new or worsening ulcerations at the site of the injury. This is why debridement is contraindicated in PG and can dramatically worsen the clinical picture. Koebner phenomenon (isomorphic response) refers to new lesions of a pre-existing dermatosis appearing in traumatized skin (as in psoriasis or lichen planus) and is a distinct concept. Treatment focuses on immunosuppression, not wound excision.

Question 162: Which of the following is the most common cause of peripheral neuropathy in the United States?

Alcohol abuse
Vitamin B12 deficiency
Diabetes mellitus (Correct answer)
Hypothyroidism

Correct answer: Diabetes mellitus

Diabetic peripheral neuropathy is the most common cause of peripheral neuropathy in the US, affecting up to 50% of diabetic patients.

Question 163: A 58-year-old man presents with progressive gait ataxia, autonomic dysfunction, and parkinsonism that is poorly responsive to levodopa. MRI shows atrophy of the pons, cerebellum, and middle cerebellar peduncles with a 'hot cross bun' sign. Which pathological hallmark distinguishes this condition from Parkinson's disease?

TDP-43 inclusions in motor neurons
Neuronal Lewy bodies in the substantia nigra
Glial cytoplasmic inclusions containing alpha-synuclein in oligodendrocytes (Correct answer)
Tau-positive neurofibrillary tangles in the basal ganglia

Correct answer: Glial cytoplasmic inclusions containing alpha-synuclein in oligodendrocytes

Multiple system atrophy (MSA) is characterized by glial cytoplasmic inclusions (GCIs) containing misfolded alpha-synuclein within oligodendrocytes — not neurons. This distinguishes it from Parkinson's disease, where alpha-synuclein aggregates form Lewy bodies within neurons. The 'hot cross bun' sign on MRI reflects cruciform T2 hyperintensity from selective pontine fiber degeneration.

Question 164: A 52-year-old man with a 15-year history of Parkinson's disease (on levodopa/carbidopa) develops visual hallucinations, vivid dreams, and cognitive fluctuations. His motor symptoms are well controlled. Quetiapine is tried but provides insufficient psychosis control. Which agent is FDA-approved for Parkinson's disease psychosis and carries a black-box warning that must be discussed with the patient?

Brexpiprazole
Pimavanserin (Correct answer)
Clozapine
Olanzapine

Correct answer: Pimavanserin

Pimavanserin (Nuplazid) is the only FDA-approved treatment specifically for Parkinson's disease psychosis (PDP). It acts as a selective serotonin 5-HT2A inverse agonist/antagonist without dopamine receptor blockade, so it does not worsen motor symptoms. It carries a black-box warning for increased mortality in elderly patients with dementia-related psychosis — this must be disclosed. Clozapine is effective but requires REMS monitoring for agranulocytosis and is not FDA-approved for PDP. Olanzapine worsens motor symptoms due to D2 blockade. Brexpiprazole is not approved for this indication.

Question 165: Target (iris) lesions with three concentric zones on the skin and mucous membranes are characteristic of which hypersensitivity reaction?

Dermatitis herpetiformis
Bullous pemphigoid
Pemphigus vulgaris
Erythema multiforme (Correct answer)

Correct answer: Erythema multiforme

Erythema multiforme is characterized by target or iris lesions with a central dark zone, pale edematous ring, and outer erythematous ring, most commonly triggered by herpes simplex virus.

Question 166: A 31-year-old woman at 10 weeks gestation is found to have a complete hydatidiform mole on ultrasound. Suction curettage is performed. Post-evacuation β-hCG is 85,000 mIU/mL. Four weeks later, β-hCG is 60,000 mIU/mL. Eight weeks post-evacuation, β-hCG is 55,000 mIU/mL. She has no metastatic symptoms, no uterine enlargement, and chest X-ray is clear. According to FIGO criteria, what is the most appropriate diagnosis and management at this point?

GTN with likely metastatic disease; initiate multiagent chemotherapy with EMA-CO
Persistent gestational trophoblastic disease; repeat suction curettage before initiating chemotherapy
Normal post-molar regression; continue surveillance with monthly β-hCG measurements
Gestational trophoblastic neoplasia (GTN); initiate single-agent chemotherapy with methotrexate (Correct answer)

Correct answer: Gestational trophoblastic neoplasia (GTN); initiate single-agent chemotherapy with methotrexate

By FIGO criteria, post-molar GTN is diagnosed when β-hCG plateaus (less than 10% decline over 3 consecutive weekly measurements across 3 weeks) or rises. Here, hCG has plateaued over 8 weeks. With no evidence of metastatic disease (negative CXR, no symptoms) and a presumed low FIGO risk score, single-agent chemotherapy (methotrexate or actinomycin-D) is the standard of care. Repeat curettage is not recommended as routine management after GTN diagnosis—it carries perforation risk and rarely alters outcome. Multiagent EMA-CO is reserved for high-risk or metastatic GTN.

Question 167: Which HPV genotype combination accounts for the majority of cervical cancer cases?

HPV 31 and 33
HPV 6 and 11
HPV 45 and 52
HPV 16 and 18 (Correct answer)

Correct answer: HPV 16 and 18

HPV 16 and 18 together cause approximately 70% of all cervical cancers, with HPV 16 being more associated with squamous cell carcinoma and HPV 18 with adenocarcinoma.

Question 168: A mole on the student's back has changed in size and color, and he is a 24-year-old medical student. He has no family history of skin cancer and is in good health. Although he has fair skin and served as a lifeguard for two summers while in college, he cannot recall ever getting a bad sunburn. Recently, the mole has occasionally itched, which has drawn his attention to it. The 0.8 cm-long lesion has an uneven border and is located on the left upper back, slightly below the shoulder. No nodule is palpable, however, there are minor color variations. On examination with a magnifying lens, no ulceration was found. Except for a few benign-looking skin nevi, the rest of his physical evaluation is ordinary. Lymphadenopathy is not seen in the cervical, supraclavicular, or axillary areas. There is a wide excisional biopsy of the mole. Which of the following pathologies and clinical findings is most crucial for determining prognosis?

Sex of the patient
Age of patient
Location of the melanoma
Depth of penetration
Tumor thickness (Correct answer)

Correct answer: Tumor thickness

For melanoma, tumor thickness, also known as Breslow depth, is the single most important prognostic factor. It directly correlates with the risk of metastasis and overall survival. Thicker melanomas indicate a deeper invasion into the skin layers and are associated with a worse prognosis. This measurement is crucial for staging the melanoma and guiding subsequent treatment decisions.

Question 169: A 24-year-old presents with secondary amenorrhea, galactorrhea, and headaches. Serum prolactin is 180 ng/mL. What is the most likely diagnosis?

Sheehan syndrome
Hypothyroidism
Polycystic ovary syndrome
Prolactinoma (Correct answer)

Correct answer: Prolactinoma

Markedly elevated prolactin with galactorrhea, amenorrhea, and headaches (from mass effect) is classic for a prolactin-secreting pituitary adenoma (prolactinoma).

Question 170: Tinea versicolor, characterized by hypo- or hyperpigmented patches, is most commonly caused by which organism?

Trichophyton rubrum
Malassezia furfur (Correct answer)
Candida albicans
Microsporum canis

Correct answer: Malassezia furfur

Tinea versicolor is caused by Malassezia furfur (Pityrosporum ovale), a commensal yeast that overgrows in warm, humid conditions and disrupts normal skin pigmentation.

Question 171: A 34-year-old woman with bipolar I disorder maintained on lithium for 3 years presents with a 6-week history of depressive episodes. Her lithium level is 0.9 mEq/L. She also reports polyuria and polydipsia. TSH is 8.2 mIU/L. Which of the following is the MOST appropriate next step?

Switch lithium to valproate and refer to endocrinology
Add levothyroxine and continue lithium (Correct answer)
Reduce lithium dose to target a level of 0.6 mEq/L
Add lamotrigine and monitor lithium levels monthly

Correct answer: Add levothyroxine and continue lithium

Lithium-induced hypothyroidism occurs in up to 40% of long-term users and can precipitate depressive breakthrough. The correct approach is to treat the hypothyroidism with levothyroxine while continuing lithium, which remains effective for bipolar I maintenance. Switching to valproate is not indicated for a therapeutic lithium level; reducing the dose risks destabilizing mood without addressing the hypothyroidism; lamotrigine addition does not address the root hormonal cause of the depression.

Question 172: Which imaging modality is preferred for evaluating suspected acute ischemic stroke?

CT with contrast
PET scan
Non-contrast CT of the head (Correct answer)
MRI with gadolinium

Correct answer: Non-contrast CT of the head

Non-contrast CT is the first-line study to rule out hemorrhage before thrombolytic therapy in acute stroke.

Question 173: A 58-year-old man presents with progressive gait ataxia, dysarthria, and vertical supranuclear gaze palsy. He has frequent falls due to backward postural instability. MRI shows midbrain atrophy with a 'hummingbird sign.' Which protein aggregate is most characteristic of this condition?

TDP-43
Beta-amyloid
Alpha-synuclein
Tau (4-repeat isoform) (Correct answer)

Correct answer: Tau (4-repeat isoform)

The clinical picture describes Progressive Supranuclear Palsy (PSP), characterized by vertical supranuclear gaze palsy, early postural instability with backward falls, midbrain atrophy ('hummingbird sign'), and parkinsonism. PSP is a 4-repeat tauopathy, meaning tau aggregates predominantly as 4-repeat (4R) isoforms in neurons and glia. Alpha-synuclein is seen in Parkinson's and MSA; TDP-43 in ALS and FTLD; beta-amyloid in Alzheimer's disease.

Question 174: A patient develops septic shock. After fluid resuscitation fails to maintain MAP ≥ 65 mmHg, what is the first-line vasopressor?

Norepinephrine (Correct answer)
Phenylephrine
Epinephrine
Dopamine

Correct answer: Norepinephrine

Norepinephrine is the first-line vasopressor for septic shock per Surviving Sepsis Campaign guidelines due to its strong alpha-adrenergic vasoconstrictor activity.

Question 175: A patient presents with a well-demarcated, erythematous plaque with silvery scale on the elbow. The Auspitz sign is positive. What is the most likely diagnosis?

Tinea corporis
Seborrheic dermatitis
Pityriasis rosea
Psoriasis vulgaris (Correct answer)

Correct answer: Psoriasis vulgaris

Psoriasis vulgaris classically presents with well-demarcated erythematous plaques with silvery scale and a positive Auspitz sign (pinpoint bleeding upon scale removal).

Question 176: A multipara at 38 weeks has a Bishop score of 8. What does this indicate?

The cervix is favorable for induction (Correct answer)
Induction is likely to fail
Immediate cesarean delivery is indicated
Cervical ripening agents are required

Correct answer: The cervix is favorable for induction

A Bishop score ≥8 indicates a favorable cervix with high likelihood of successful labor induction without the need for cervical ripening agents.

Question 177: Which of the following best describes the mechanism of action of phenytoin?

Blocks sodium channels in their inactivated state (Correct answer)
Blocks NMDA receptors
Enhances GABA-A receptor activity
Inhibits calcium T-type channels

Correct answer: Blocks sodium channels in their inactivated state

Phenytoin stabilizes neuronal membranes by blocking voltage-gated sodium channels in their inactivated state, preventing repetitive firing.

Question 178: In damage control surgery for abdominal trauma, which is the correct sequence of operations?

Definitive repair → ICU resuscitation → planned reoperation
ICU resuscitation → laparotomy → damage control
Abbreviated surgery for hemorrhage/contamination control → ICU resuscitation → definitive repair (Correct answer)
Full resection and anastomosis immediately → ICU → wound closure

Correct answer: Abbreviated surgery for hemorrhage/contamination control → ICU resuscitation → definitive repair

Damage control surgery follows a three-phase approach: abbreviated laparotomy to control hemorrhage and contamination, ICU resuscitation correcting the 'lethal triad,' then definitive repair at planned reoperation.

Question 179: A patient has weakness of finger abduction and adduction with wasting of the intrinsic hand muscles but intact wrist flexion. Which nerve is most likely injured?

Ulnar nerve (Correct answer)
Median nerve
Radial nerve
Musculocutaneous nerve

Correct answer: Ulnar nerve

The ulnar nerve innervates most intrinsic hand muscles including the interossei and hypothenar muscles responsible for finger abduction/adduction.

Question 180: A 58-year-old man presents with sudden-onset severe headache described as 'the worst headache of my life.' What is the most critical diagnosis to rule out?

Subarachnoid hemorrhage (Correct answer)
Tension-type headache
Migraine with aura
Cluster headache

Correct answer: Subarachnoid hemorrhage

A sudden, severe 'thunderclap' headache must be presumed to be subarachnoid hemorrhage until proven otherwise by CT and lumbar puncture.

Question 181: A competent adult patient refuses a blood transfusion on religious grounds, even though the physician believes it is life-saving. What is the ethically correct action?

Transfer care to another physician who will transfuse
Respect the patient's refusal and document it (Correct answer)
Obtain a court order to override the refusal
Administer the transfusion to save the patient's life

Correct answer: Respect the patient's refusal and document it

Competent adults have the right to refuse medical treatment, including life-saving measures, based on the principle of autonomy.

Question 182: Which parameter is used to assess how much of the body a drug distributes into, with high values suggesting extensive tissue binding?

Protein binding percentage
Volume of distribution (Vd) (Correct answer)
Clearance
Bioavailability

Correct answer: Volume of distribution (Vd)

A high volume of distribution (Vd) indicates that a drug distributes extensively into tissues beyond the bloodstream, often reflecting lipophilicity or tissue binding.

Question 183: Wickham striae—fine white lacy lines on skin lesions—are pathognomonic for which dermatological condition?

Psoriasis
Lichen sclerosus
Pityriasis rosea
Lichen planus (Correct answer)

Correct answer: Lichen planus

Wickham striae are fine white lacy lines on lesion surfaces that serve as a characteristic diagnostic feature of lichen planus, a T-cell-mediated inflammatory condition.

Question 184: A 35-year-old pregnant woman at 28 weeks gestation presents with right flank pain. What is the preferred initial imaging modality?

Intravenous pyelogram (IVP)
MRI with gadolinium
Non-contrast CT of the abdomen and pelvis
Renal ultrasound (Correct answer)

Correct answer: Renal ultrasound

Ultrasound is the first-line modality in pregnancy because it carries no ionizing radiation and can diagnose hydronephrosis and renal calculi without fetal risk.

Question 185: Which finding on ultrasound is most consistent with acute cholecystitis?

Dilated common bile duct only
Gallbladder wall thickening with a positive Murphy's sign on US (Correct answer)
Intrahepatic biliary dilation
Hyperechoic bile with shadowing

Correct answer: Gallbladder wall thickening with a positive Murphy's sign on US

Sonographic Murphy's sign (probe tenderness over the gallbladder) combined with wall thickening >4 mm is highly specific for acute cholecystitis.

Question 186: Under HIPAA, a covered entity may disclose protected health information without patient authorization in which of the following situations?

To share records with the patient's employer upon request
To report imminent danger to an identified third party (Correct answer)
To provide records to the patient's insurance company for marketing
To discuss treatment with a patient's adult sibling

Correct answer: To report imminent danger to an identified third party

HIPAA permits disclosure without authorization when necessary to prevent or lessen a serious and imminent threat to the health or safety of an identified person.

Question 187: In SPEX practice, what is the best approach to quality improvement in neurology?

Copy what other organizations do without analysis
Make changes without measuring results
Use data-driven methods with measurable outcomes (Correct answer)
Wait for problems to occur before acting

Correct answer: Use data-driven methods with measurable outcomes

Data-driven quality improvement with measurable outcomes ensures that changes actually produce the intended improvements and can be verified.

Question 188: A 40-year-old man presents with 3 months of epigastric pain relieved by eating. H. pylori testing is positive. What is the recommended treatment?

Triple therapy: omeprazole + clarithromycin + amoxicillin (Correct answer)
Bismuth quadruple therapy as first-line
Omeprazole alone for 8 weeks
H2 blocker therapy for 4 weeks

Correct answer: Triple therapy: omeprazole + clarithromycin + amoxicillin

Clarithromycin-based triple therapy remains a common first-line regimen for H. pylori eradication in areas of low clarithromycin resistance.

Question 189: A 51-year-old woman with primary Sjögren's syndrome presents with progressive bilateral lower extremity weakness, areflexia, and loss of vibration sense over 6 months. Nerve conduction studies show reduced compound sensory nerve action potential amplitudes with preserved conduction velocities, predominantly in the lower extremities. CSF protein is 78 mg/dL with no pleocytosis. Which pathophysiologic mechanism BEST explains her neurologic presentation?

Autonomic neuropathy from small fiber involvement
Dorsal root ganglionopathy (sensory neuronopathy) from lymphocytic infiltration (Correct answer)
Motor neuronopathy from anti-Ro/SSA antibody deposition in anterior horn cells
Demyelinating polyneuropathy from cryoglobulinemic vasculitis

Correct answer: Dorsal root ganglionopathy (sensory neuronopathy) from lymphocytic infiltration

Sjögren's syndrome is uniquely associated with sensory neuronopathy (dorsal root ganglionopathy), caused by lymphocytic infiltration of the dorsal root ganglia rather than peripheral nerve axons or myelin. This produces a non-length-dependent, predominantly sensory pattern with reduced SNAP amplitudes and preserved motor conduction — consistent with the NCS findings described. The sensory ataxia and areflexia reflect large fiber proprioceptive loss. Cryoglobulinemic vasculitis produces a length-dependent axonal neuropathy or mononeuritis multiplex. Anti-Ro antibodies are not known to target anterior horn cells. Small fiber autonomic neuropathy presents with pain, anhidrosis, and orthostatic symptoms — not the large-fiber pattern described here.

Question 190: During ICP-OES analysis using SPEX CertiPrep certified standards, a laboratory notices that the calcium signal at 317.933 nm is consistently 8% higher than expected even after matrix-matching. After ruling out contamination, what is the most likely root cause?

An expired SPEX certified reference material causing drift in the working curve
Spectral overlap from vanadium emission lines near the calcium wavelength (Correct answer)
The peristaltic pump tubing has degraded, causing non-linear uptake rates
Insufficient argon purge time leading to atmospheric oxygen entrainment

Correct answer: Spectral overlap from vanadium emission lines near the calcium wavelength

Vanadium has several emission lines in the 317–318 nm region that can cause spectral interference on the Ca 317.933 nm line, especially in samples with elevated vanadium content. This is a classic non-spectral vs. spectral interference distinction: the 8% positive bias and the exclusion of contamination and matrix mismatch point directly to a spectral overlap. SPEX analysis protocols require interference correction factors (ICFs) for known overlaps, and the Ca 317.933 nm line is a documented overlap risk when vanadium >10× calcium concentration.

Question 191: A radiologist reviews a Tc-99m MAA (macroaggregated albumin) lung perfusion scan for a patient with suspected pulmonary embolism. Perfusion defects are present bilaterally in a segmental distribution. However, the ventilation scan (Xe-133) shows matched ventilation-perfusion abnormalities in the same regions. Which additional scintigraphic finding would UPGRADE this study from INTERMEDIATE to HIGH probability for PE according to PIOPED II criteria?

A stripe sign (peripheral lung parenchyma preserved) adjacent to one of the matched defects
Multiple subsegmental perfusion defects with matched ventilation defects and a normal chest X-ray
A single large perfusion defect with matched ventilation defect in the right lower lobe
Two or more large segmental perfusion defects with normal ventilation in the corresponding lung zones (Correct answer)

Correct answer: Two or more large segmental perfusion defects with normal ventilation in the corresponding lung zones

PIOPED II high-probability criteria require ≥2 large segmental perfusion defects WITHOUT matched ventilation defects (V/Q mismatch). If ventilation is normal in regions with perfusion defects, this is a classic mismatch pattern consistent with high-probability PE. A single large matched defect is intermediate. Subsegmental matched defects on a normal CXR remain intermediate. The stripe sign indicates that perfusion is partially preserved peripherally adjacent to a defect, which actually DECREASES the probability of PE by suggesting alternative pathology like atelectasis, not increasing it.

Question 192: A patient on warfarin begins taking trimethoprim-sulfamethoxazole for a UTI. What is the most likely effect on warfarin's anticoagulant activity?

Decreased anticoagulation due to enzyme induction
No significant interaction expected
Increased anticoagulation due to enzyme inhibition (Correct answer)
Decreased anticoagulation due to reduced absorption

Correct answer: Increased anticoagulation due to enzyme inhibition

TMP-SMX inhibits CYP2C9, the primary enzyme metabolizing warfarin's S-enantiomer, leading to elevated INR and increased bleeding risk.

Question 193: A 4-year-old has a fever of 39°C, sore throat, and tonsillar exudates with tender anterior cervical lymphadenopathy. A rapid strep test is positive. What is the appropriate treatment?

Amoxicillin for 10 days (Correct answer)
Cephalexin for 7 days
No antibiotics; viral etiology
Azithromycin for 5 days

Correct answer: Amoxicillin for 10 days

Group A streptococcal pharyngitis is treated with amoxicillin for 10 days to eradicate infection and prevent rheumatic fever.

Question 194: A psychiatrist is treating a patient who discloses intent to kill a specific identifiable third party. The psychiatrist is located in a state that has a Tarasoff-based duty-to-protect statute. What is the MINIMUM required action?

Document the threat and increase session frequency
Warn the potential victim and/or notify law enforcement (Correct answer)
Notify the patient's next of kin
Consult a peer and maintain strict confidentiality

Correct answer: Warn the potential victim and/or notify law enforcement

Most state duty-to-protect laws require clinicians to take reasonable steps to protect an identifiable third party, which typically includes warning the victim and/or notifying law enforcement.

Question 195: What is the first-line topical treatment for inflammatory rosacea (papules and pustules)?

Topical tretinoin
Topical salicylic acid
Topical metronidazole (Correct answer)
Topical hydrocortisone

Correct answer: Topical metronidazole

Topical metronidazole is a first-line treatment for inflammatory rosacea, reducing papules and pustules through anti-inflammatory mechanisms; topical azelaic acid is an effective alternative.

Question 196: A 60-year-old presents with acute onset unilateral facial droop, arm weakness, and speech difficulty starting 2 hours ago. CT head is negative. What is the next step if no contraindications exist?

tPA (alteplase) administration (Correct answer)
MRI brain before any treatment
Aspirin 325mg and admission
Heparin infusion

Correct answer: tPA (alteplase) administration

Acute ischemic stroke within the 4.5-hour window with no contraindications warrants IV tPA (alteplase) after CT rules out hemorrhage.

Question 197: Which of the following BEST characterizes the content blueprint of the SPEX examination in terms of clinical discipline weighting?

SPEX is divided into two distinct halves: the first covering basic sciences and the second covering clinical application, paralleling USMLE Step 1 and Step 2 content.
SPEX focuses exclusively on primary care scenarios because relicensing physicians are expected to practice in underserved, generalist settings.
SPEX weights questions heavily toward internal medicine and surgery, reflecting the most common areas of clinical malpractice claims.
SPEX distributes content across multiple organ systems and physician tasks using a generalist blueprint similar to broad licensure examinations, with no single specialty dominating. (Correct answer)

Correct answer: SPEX distributes content across multiple organ systems and physician tasks using a generalist blueprint similar to broad licensure examinations, with no single specialty dominating.

The SPEX content blueprint mirrors a broad, generalist licensure framework—similar in philosophy to USMLE Step 3—spanning multiple organ systems and physician tasks (diagnosis, management, health maintenance, etc.) without overweighting any single specialty. It is designed to assess competency for the broad scope of medical practice, not specialty-specific or primary-care-exclusive content.

Question 198: A state epidemiologist investigates a cluster of 11 cases of Vibrio vulnificus septicemia over 6 weeks, all among adults who consumed raw oysters from a single licensed estuary. Water temperatures were documented at 28°C. The estuary tested negative for fecal coliforms. Which preventive intervention has the STRONGEST evidence for reducing Vibrio vulnificus mortality risk at the individual level?

Advising high-risk individuals (liver disease, immunocompromised) to avoid raw shellfish entirely (Correct answer)
Issuing a seasonal harvest closure when water temperatures exceed 25°C
Requiring rapid chilling of harvested oysters to ≤10°C within 2 hours of harvest
Mandatory post-harvest high-pressure processing (HPP) of all oysters from the estuary

Correct answer: Advising high-risk individuals (liver disease, immunocompromised) to avoid raw shellfish entirely

Vibrio vulnificus causes fulminant septicemia almost exclusively in individuals with underlying liver disease (cirrhosis, hepatitis), hemochromatosis, diabetes, or immunosuppression — with case fatality rates exceeding 50% in these groups. The strongest individual-level preventive measure with evidence-based support is counseling high-risk individuals to completely avoid raw shellfish. While HPP, temperature controls, and cold-chain management are effective regulatory/supply-chain interventions that reduce Vibrio burden in shellfish, they do not eliminate the risk to a zero threshold. At the individual clinical level, absolute avoidance in high-risk patients is the most impactful recommendation.

Question 199: A 34-year-old woman with a history of migraine with aura has a first unprovoked seizure. She is started on valproic acid. Six weeks later she presents with confusion, asterixis, and elevated ammonia with normal liver function tests. What is the most likely mechanism?

Valproate-induced hepatotoxicity causing reduced urea cycle capacity
Valproate-induced mitochondrial beta-oxidation defects reducing glutamate clearance
Valproate inhibition of carbamoyl phosphate synthetase I in the urea cycle
Occult ornithine transcarbamylase deficiency unmasked by valproate (Correct answer)

Correct answer: Occult ornithine transcarbamylase deficiency unmasked by valproate

Valproate can precipitate hyperammonemic encephalopathy in patients with previously undiagnosed partial ornithine transcarbamylase (OTC) deficiency — the most common urea cycle disorder, X-linked. OTC deficiency in heterozygous females may be clinically silent until valproate inhibits OTC directly, reduces carnitine (impairing ammonia detoxification), and increases nitrogen load, pushing a partially compensated patient into crisis. Normal LFTs exclude hepatotoxicity. This is a classic unmasking scenario rather than a primary drug toxicity.

Question 200: A 52-year-old woman presents with a 2-year history of generalized pruritus, erosions, and tense bullae predominantly on her trunk and extremities. Direct immunofluorescence (DIF) of perilesional skin shows linear IgG and C3 deposition along the dermal-epidermal junction. Indirect immunofluorescence on salt-split skin shows IgG binding to the ROOF (epidermal side) of the split. Serum ELISA is positive for BP180 and BP230 antibodies. She fails to respond adequately to high-dose topical clobetasol. What is the MOST appropriate next-line systemic therapy based on current evidence?

Dupilumab 600 mg SC loading dose followed by 300 mg every 2 weeks
Rituximab 1000 mg IV on days 1 and 15
Oral prednisone 0.5 mg/kg/day combined with doxycycline 200 mg/day (Correct answer)
Intravenous immunoglobulin (IVIG) at 2 g/kg per cycle monthly

Correct answer: Oral prednisone 0.5 mg/kg/day combined with doxycycline 200 mg/day

This patient has bullous pemphigoid (BP), confirmed by tense bullae, linear IgG/C3 at the DEJ on DIF, roof-binding on salt-split skin (confirming antibodies target hemidesmosomal proteins above the lamina densa), and positive BP180/BP230 ELISA. When high-potency topical steroids fail or are insufficient, the current evidence-based first-line systemic option for BP is oral prednisone combined with doxycycline. Multiple randomized trials (including the BLISTER trial) have shown that doxycycline 200 mg/day (as monotherapy or combined with low-dose prednisolone) achieves disease control comparable to systemic steroids alone but with a superior safety profile — particularly important given BP's typical patient population (elderly with comorbidities). Rituximab and IVIG are reserved for refractory or severe cases. Dupilumab (anti-IL-4Rα) has emerging evidence for BP but is not yet established as the second-line standard of care.

Special Purpose Examination (SPEX)

The SPEX is a computerized multiple-choice examination administered by the FSMB that assesses the current medical knowledge of physicians seeking re-licensure or license reinstatement. It evaluates competency in general, undifferentiated medical practice across disease categories and physician tasks organized by general principles and organ systems.

200

Questions

300 min

Time Limit

75%

To Pass

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