Dermatology Flashcards
6 cards from real AANP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Dermatology flashcards as text
A patient with fair skin has a pearly, translucent nodule with telangiectasias on the nose. What is the most likely diagnosis?
Answer: Basal cell carcinoma
Basal cell carcinoma typically presents as a pearly or translucent papule or nodule with rolled borders and telangiectasias, most commonly on sun-exposed areas of the face.
Which condition is characterized by salmon-colored patches in skin folds (axilla, groin) with fine scale that fluoresce coral-red under Wood's lamp?
Answer: Erythrasma
Erythrasma is a superficial bacterial infection caused by Corynebacterium minutissimum that produces coral-red fluorescence under Wood's lamp due to porphyrin production.
A nurse practitioner diagnoses a patient with actinic keratosis. Why is treatment recommended even for asymptomatic lesions?
Answer: They are premalignant lesions that can progress to squamous cell carcinoma
Actinic keratoses are premalignant lesions caused by UV damage that can progress to invasive squamous cell carcinoma, justifying treatment even when asymptomatic.
What finding on skin examination is most suggestive of scabies infestation?
Answer: Burrows in finger web spaces with intense nocturnal pruritus
Sarcoptes scabiei mites create linear burrows in thin-skinned areas like finger webs, with intense itching that worsens at night due to mite activity.
Which topical agent is used as first-line treatment for rosacea with predominantly inflammatory papules and pustules?
Answer: Topical metronidazole or azelaic acid
Topical metronidazole and azelaic acid have anti-inflammatory properties and are first-line treatments for papulopustular rosacea; topical steroids can worsen rosacea.
A patient with darkening, velvety, hyperpigmented skin in the axillae and neck creases most likely has which underlying condition?
Answer: Insulin resistance or type 2 diabetes
Acanthosis nigricans is strongly associated with insulin resistance and hyperinsulinemia, which stimulate keratinocyte and fibroblast proliferation via IGF-1 receptors.