DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Dermatofibroma on the shoulder of a 20 year old man. A dermatofibroma, also called a benign fibrous histiocytoma, is a non-cancerous tumour that usually occurs on the hands or feet. It is composed of disordered collagen laid down by fibroblast cells. In rare cases, basal cell carcinoma may develop within a dermatofibroma.
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