A 21-year-old man presents to urgent care concerned about a painless blackish lesion that had developed on his left heel. On examination, a stippled, deeply violaceous, blackish patch with overlying scale was seen on his plantar heel. He had no history of dermatological disease but mentioned he played in a basketball tournament last week. View the image above and consider what your diagnosis and next steps would be. Resolution of the case is described on …
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