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Dermatology · Hair disorders: telogen effluvium
Sample itemA 29-year-old woman notices heavy diffuse hair shedding three months after childbirth. The scalp looks normal without scarring, and a gentle pull test removes more than six hairs from each area. What is the diagnosis and the outlook?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
B. Telogen effluvium, which usually recovers spontaneously within about 6 months
Telogen effluvium is diffuse shedding that follows a physiological stress such as childbirth, high fever, surgery, crash dieting or certain drugs, by synchronising follicles into the resting phase. Shedding begins about 2 to 3 months later and recovers over several months once the trigger passes. Iron, thyroid and nutritional causes are checked.
Option by option
A. Scarring alopecia, which needs biopsy and immunosuppression
Scarring alopecias show loss of follicular openings.
B. Telogen effluvium, which usually recovers spontaneously within about 6 months (correct)
Correct. Diffuse non-scarring shedding after a trigger is typical and usually resolves.
C. Trichotillomania, which needs surgery
Trichotillomania causes irregular patchy loss with broken hairs from pulling.
D. Alopecia areata, which is permanent
Alopecia areata causes sharply defined round patches, with exclamation-mark hairs.
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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