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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