Dermatologic System Disorders Flashcards
7 cards from real Physician Assistant practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Dermatologic System Disorders flashcards as text
An 80-year-old has tense, pruritic bullae on the flexural thighs and abdomen; Nikolsky sign is negative and immunofluorescence shows linear IgG and C3 at the basement membrane. What is the diagnosis?
Answer: Bullous pemphigoid
Bullous pemphigoid causes subepidermal tense bullae in the elderly with linear IgG/C3 deposition at the BMZ.
A patient with celiac disease has intensely pruritic grouped vesicles on the elbows and buttocks. Which medication provides rapid symptom relief?
Answer: Dapsone
Dermatitis herpetiformis responds rapidly to dapsone, while a strict gluten-free diet is the long-term treatment.
Rough, sandpaper-like scaly erythematous macules on the sun-exposed scalp of a fair-skinned 70-year-old are precursors to which malignancy?
Answer: Squamous cell carcinoma
Actinic keratoses are premalignant lesions that can progress to squamous cell carcinoma.
A patient has a bright red, raised, sharply demarcated, indurated plaque on the cheek with fever. Which organism is most likely?
Answer: Streptococcus pyogenes
Erysipelas involves the upper dermis and superficial lymphatics and is most often caused by group A streptococcus.
A patient presents 8 hours after a cat bite to the hand with erythema and swelling. What is the most appropriate oral antibiotic?
Answer: Amoxicillin-clavulanate
Amoxicillin-clavulanate covers Pasteurella multocida, anaerobes, and staphylococci from animal bites.
Which finding best distinguishes papulopustular rosacea from acne vulgaris?
Answer: Absence of comedones
Rosacea features central facial erythema, papules, and pustules without comedones.
A child has multiple firm, dome-shaped, flesh-colored papules with central umbilication on the trunk. Which virus causes these lesions?
Answer: Poxvirus
Molluscum contagiosum is caused by a poxvirus and produces umbilicated papules.
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