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Dermatology · Hair disorders
Sample itemWhich trichoscopic feature supports alopecia areata at the edge of a smooth patch of hair loss?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Exclamation-mark hairs
Alopecia areata can show tapered exclamation-mark hairs at the margin of smooth nonscarring alopecia, reflecting immune-mediated injury to growing hairs.
Option by option
A. Exclamation-mark hairs (correct)
Correct: tapering near the scalp produces characteristic exclamation-mark hairs.
B. Thick yellow subungual debris
Subungual debris is a finding of nail fungal infection.
C. A fixed dermatomal vesicular rash
Dermatomal vesicles suggest herpes zoster.
D. Greasy adherent scalp scale
Greasy scale suggests seborrhoeic dermatitis.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.