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Dermatology · Leprosy: borderline leprosy
Sample itemWhich lesion morphology is most characteristic of mid-borderline (BB) leprosy?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
C. Punched-out or inverted saucer lesions with a sharply defined inner edge
Mid-borderline leprosy, the most unstable part of the spectrum, shows punched-out or inverted saucer plaques with a well-defined inner margin and a sloping outer edge. It tends to downgrade toward lepromatous disease or upgrade with treatment.
Option by option
A. Diffuse symmetric infiltration of face and ears
Diffuse symmetric infiltration is typical of lepromatous leprosy.
B. Small follicular papules on the trunk
Follicular papules are not typical of leprosy.
C. Punched-out or inverted saucer lesions with a sharply defined inner edge (correct)
Correct. Inverted saucer lesions are typical of BB.
D. A single hypopigmented macule
A single macule suggests indeterminate or tuberculoid disease.
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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