CSFA Advanced Surgical Anatomy 3 — Questions and Answers
Question 1: In thoracic surgery, which structure lies immediately posterior to the esophagus in the posterior mediastinum and is at risk during esophagectomy?
- Thoracic duct
- Azygos vein
- Descending thoracic aorta (Correct answer)
- Right vagus nerve
Correct answer: Descending thoracic aorta
The descending thoracic aorta lies immediately posterior to the esophagus and can be injured during extensive esophageal mobilization.
Question 2: During inguinal hernia repair, the ilioinguinal nerve runs within which anatomical space?
- Femoral canal
- Inguinal canal (Correct answer)
- Obturator canal
- Lacunar ligament space
Correct answer: Inguinal canal
The ilioinguinal nerve travels through the inguinal canal and exits via the superficial inguinal ring to supply the medial thigh and scrotum/labia.
Question 3: Which layer of the abdominal wall is continuous with the cremasteric fascia in males?
- External oblique aponeurosis
- Internal oblique muscle (Correct answer)
- Transversalis fascia
- Scarpa's fascia
Correct answer: Internal oblique muscle
The internal oblique muscle contributes fibers to form the cremaster muscle and cremasteric fascia as the spermatic cord passes through the inguinal canal.
Question 4: The hepatoduodenal ligament (free edge of the lesser omentum) contains all of the following EXCEPT:
- Portal vein
- Hepatic artery proper
- Common bile duct
- Hepatic veins (Correct answer)
Correct answer: Hepatic veins
The hepatic veins drain directly into the inferior vena cava at the liver and are not contained within the hepatoduodenal ligament.
Question 5: During a posterior fossa craniotomy, which cranial nerve emerges from the pontomedullary junction and is at risk during cerebellopontine angle dissection?
- CN V (trigeminal)
- CN VII (facial) (Correct answer)
- CN IX (glossopharyngeal)
- CN XI (accessory)
Correct answer: CN VII (facial)
The facial nerve (CN VII) emerges at the pontomedullary junction and traverses the cerebellopontine angle, making it highly vulnerable during acoustic neuroma surgery.
Question 6: The ureter crosses the pelvic brim at which vascular structure, making it vulnerable during pelvic surgery?
- External iliac artery bifurcation
- Common iliac artery bifurcation (Correct answer)
- Internal iliac artery origin
- Superior vesical artery
Correct answer: Common iliac artery bifurcation
The ureter crosses the pelvic brim directly over the bifurcation of the common iliac artery, an important landmark during pelvic dissection.
Question 7: Which anatomical structure forms the medial boundary of the femoral triangle and must be protected during femoral artery exposure?
- Adductor longus muscle (Correct answer)
- Sartorius muscle
- Pectineus muscle
- Iliopsoas muscle
Correct answer: Adductor longus muscle
The adductor longus muscle forms the medial boundary of the femoral triangle, lateral to the femoral vessels during surgical exposure.
CSFA Advanced Surgical Anatomy 3
In thoracic surgery, which structure lies immediately posterior to the esophagus in the posterior mediastinum and is at risk during esophagectomy?