Definition of Dermatofibroma

Dermatofibroma: A common type of benign skin tumor that is small, slow-growing, typically firm, red-to-brown bump, seen most often on the legs. Also called a fibrous histiocytoma. It can grow up to about 1 cm (less than a half inch) in diameter. A dermatofibroma consists of a proliferation of scar-like tissue within the deeper layers of the skin (dermis).

The cause of dermatofibromas is unknown. They are usually single but sometimes may be multiple. Simple excision is curative.


Last Editorial Review: 9/20/2012

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