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
A 30-year-old woman on oral contraceptives develops symmetric brown patches on the cheeks and upper lip. Besides strict sun protection, which topical therapy is first-line?
Answer: Hydroquinone
Melasma is treated with photoprotection and depigmenting agents such as hydroquinone, often in triple combination cream.
Well-demarcated depigmented macules on the hands and periorificial face that fluoresce chalk-white under Wood lamp are most associated with which condition?
Answer: Autoimmune thyroid disease
Vitiligo is an autoimmune melanocyte disorder frequently associated with autoimmune thyroid disease.
A hiker from Connecticut has an expanding annular erythematous lesion with central clearing on the thigh and no neurologic or cardiac findings. What is the treatment of choice for a nonpregnant adult?
Answer: Oral doxycycline
Erythema migrans of early localized Lyme disease is treated with oral doxycycline for 10-14 days.
In a patient with herpes zoster of the V1 dermatome, vesicles on the tip of the nose (Hutchinson sign) indicate what?
Answer: High risk of ocular involvement
Hutchinson sign reflects nasociliary nerve involvement and predicts herpes zoster ophthalmicus requiring urgent eye evaluation.
In psoriasis, the Koebner phenomenon refers to which finding?
Answer: New lesions developing at sites of skin trauma
Koebnerization is the appearance of psoriatic lesions at sites of injury such as scratches or surgical scars.
A patient has 3 days of migratory pruritic wheals that each resolve within 24 hours, without angioedema or respiratory symptoms. What is first-line therapy?
Answer: Second-generation H1 antihistamine such as cetirizine
Non-sedating second-generation H1 antihistamines are first-line for acute urticaria.
In an 8-month-old with atopic dermatitis, which distribution is most typical?
Answer: Cheeks, scalp, and extensor surfaces
Infantile atopic dermatitis favors the face and extensor surfaces, sparing the diaper area, while older children and adults have flexural involvement.
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