Abstract
Subungual melanoma is a rarer form of melanoma encountered in clinical practice that often has a poor prognosis because it presents with advanced disease. We report a case of a 46-year-old male with a circumferential osteoinvasive melanoma that invaded the superior and lateral aspects of the periosteum of the distal phalanx. We discuss pathologic findings and common physical exam findings to facilitate earlier diagnosis of subungual melanoma.