Superficial Acral Fibromyxoma

Superficial acral fibromyxoma (digital fibromyxoma) is a rare tumor with a predilection for the subungual or periungual regions of the hands and feet. Generally, it states at dermis and has no capsule. Proliferation of the spindle and stellate-shaped fibroblastic cells in storiform and a scattered or fascicular pattern are characteristic features of this tumor. There are mast cells in myxoid or collagenous stroma. Tumor cells are often positive for CD34, CD99, and EMA immunohistochemically. In the treatment of these tumors, complete excision is recommended because of the potential recurrence. Here, we present a 60-year-old male patient with a papillomatous lesion on the second finger of his right hand. The tumor was extending into the nail bed. After excision, it was diagnosed as superficial acral fibromyxoma. The histopathological and immunohistochemical features of these rare tumors are discussed.