Superficial Acral Fibromyxoma of the Thumb: A Case Report

Abstract

The authors report a case of superficial acral fibromyxioma (SAF) in a 74-year-old male who presented with a painless mass in a periungual dorsoradial region of the right thumb. It is a rare benign neoplasm, which was recently described, that arouse on the skin and subcutaneous tissue of the hands and feet, especially in the proximity to the ungual region of male adults. Surgical treatment was performed with the excision in blocks of the margins of the lesion and fragmentation of the nail and nail matrix, according to the literature recommendation. Although there may be local recurrence in 22% of the cases, the patient presents no symptoms, deformities or functional limitations. In addition, there was no sign of tumor recurrence 18 months after the surgery. We are not aware of a similar case report in the Brazilian literature.

A Case of Superficial Acral Fibromyxoma of the Index Finger

“…Mass excision with nail plate removal and nail bed repair/reconstruction was chosen to reduce the risk of recurrence [1,2,7,[9][10][11]. The decision to perform surgery was supported by the clinical presentation and imaging.…”

Superficial Acral Fibromyxoma, Appearing as Retronychia: A Rare Clinical Entity

“…Histologically, SAFM is composed of proliferation of fusiform fibroblasts inside a myxoid, myxocollagenous, or collagenous matrix. A rich microvascular network and local infiltration of mast cells can be seen in the tumor [1, 3, 10]. Immunohistochemistry is recommended for the diagnosis and shows CD34, CD99, and EMA positivity, while the results for neural and muscular markers (S-100, HMB-45, SMA, desmin, and actin) are negative [1, 10, 11].…”