History: A 24 yo white male presented with a one month history of an eruption on his scalp and perianal ulcers.
Physical Exam: Erythematous to brownish, crusting papules and pustules were scattered throughout the scalp (Figure A). Perianal erosions surrounded by erythema ( Figure B ).
Lab: Bacterial culture from a scalp pustule was positive for staph
aureus. Viral culture from perianal erosions were negative for HSV.
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