USMLE-Rx Step 2 Qmax Challenge #21049

Check out today’s Step 2 CK Qmax Question Challenge.

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An adolescent boy is evaluated for a recent skin infection (as shown in the image). He is otherwise healthy and has never had a similar episode. He has a noncontributory social and family history. During the interview, he mentions he really enjoys working out at the community gym each day. On physical examination, he has no symptoms other than a localized infection that is pruritic and mildly malodorous.

Which of the following tests is best to confirm diagnosis?

A. Full-thickness biopsy
B. Potassium hydroxide preparation
C. Skin allergen test
D. Tzanck smear
E. Wood’s lamp

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This practice question is an actual question from the USMLE-Rx Step 2 CK test bank. Get more Step 2 CK study helpatUSMLE-Rx.com.