Superficial Acral Fibromyxoma: Clinicopathologic Analysis of Five Cases.

Superficial acral fibromyxoma is a relatively rare benign slow-growing soft-tissue tumor, first described by Fetsch's group [Hum Pathol. 2001;32:704-14]. Since then, around three hundred publications have concerned this relatively new entity. The tumor involves peri- and subungual regions of fingers and toes in middle-aged adults with slight male predominance. This acral fibrous tumor is poorly known, and in certain cases, histology results may suggest myxoid dermatofibrosarcoma, which carries a completely different prognosis. In this article, we discuss the clinicopathologic features of this acral fibrous tumor through the report of 5 cases including 1 particular clinical presentation that revealed as a retronychia in a young woman.