Abstract

Superficial Acral Fibromyxoma (SAFM) is a benign soft tissue tumor characterized by the presence of stellate and spindle-shaped cells arranged in a storiform and fascicular pattern. This tumor is relatively rare, benign and slow-growing. If often involves peri- and subungual regions of fingers and toes in middle-aged adults, with a male predominance. This acral fibrous tumor is poorly known and its histology may suggest myxoid dermatofibrosarcoma, which carries a completely different prognosis and treatment. Thus, immunohistochemistry is extremely important to differentiate SAFM from other acral fibrous tumors. We present a case of SAFM that involved the nail matrix with canalicular dystrophy of the nail plate. This finding has not been described in the literature as of the date of publication of this case report. Hence, we believe that it is important to note this presentation so that this disease can be considered in the differential diagnosis of diseases that produce this type of nail dystrophy.

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