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Dermatology · Hair disorders: trichotillomania
Sample itemA teenager has irregularly shaped scalp patches with hairs broken at varying lengths, no scaling or inflammation, and a negative pull test. What is the diagnosis?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
D. Trichotillomania
Trichotillomania is a compulsive hair-pulling disorder giving irregular patches with broken hairs of different lengths, and trichoscopy shows broken hairs and black dots. Behavioural therapy and SSRIs help.
Option by option
A. Telogen effluvium
Telogen effluvium gives diffuse shedding with a positive pull test.
B. Tinea capitis
Tinea capitis shows scaling and inflammation.
C. Alopecia areata
Alopecia areata gives smooth round patches with exclamation mark hairs.
D. Trichotillomania (correct)
Correct. Varied-length broken hairs without inflammation indicate pulling.
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.
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