A Case of Pedunculated Dermatofibrosarcoma Protuberans with Fibrosarcomatous Change

Abstract

A 49-year-old man complained of a pedunculated nodule on his right inguinal region which he had first noticed when he was 9 years old. A physical examination showed an 8 × 5cm pedunculated tumor. There was no swelling in the regional lymph nodes. Based on histopathological and immunohistochemical examinations, a diagnosis of DFSP was made. However, the tumor contained focal areas that were microscopically indistinguishable from fibrosarcoma.