Superficial epithelioid sarcoma: A clinical and histologic simulant of benign cutaneous disease

Abstract

Epithelioid sarcoma, a distinctive clinicopathologic entity, typically arises in the deep soft tissues of the upper and lower extremities. Infrequently the tumor originates in the subcutis or dermis, whereby it may be confused both clinically and microscopically with a granulomatous or benign ulcerative process. A case of superficial epithelioid sarcoma, initially diagnosed as an atypical mycobacterial infection, is presented, and its histologic distinction from granulomatous and benign fibrohistiocytic lesions is discussed.