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Dermatology · Viral infections: mpox
Sample itemA patient has fever followed by synchronous vesiculopustular lesions that all look the same age. Which feature best distinguishes mpox from smallpox?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
B. Prominent lymphadenopathy
Mpox is an orthopoxvirus infection whose rash evolves through macule, papule, vesicle, pustule and crust in step. Lymphadenopathy is prominent in mpox and generally absent in smallpox.
Option by option
A. Absence of fever
Fever is present in the prodrome of both diseases.
B. Prominent lymphadenopathy (correct)
Correct. Lymphadenopathy is the key clinical difference.
C. Centripetal distribution
Centripetal distribution is a feature of varicella.
D. Lesions in different stages
Lesions of the same stage are common to both mpox and smallpox, and varicella has different stages.
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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