Outline
DOI: 10.1001/jamadermatol.2026.4222 ISSN: 2168-6068
An Unusually Shaped Mass Over the Proximal Nail Fold
Ashwin Raghavan, Lai Kuan ChooiA 23-year-old man presented with an asymptomatic, progressive growth over the lateral aspect of his left great toenail 1 year prior, directly following a marathon. Physical examination revealed a firm, flesh-colored solitary periungual nodule beneath the eponychium. What is your diagnosis?
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