The lesion has been present for a few years without change, which suggests it is benign . The growth is small, firm, and located on an extremity, all of which are features of dermatofibromas.

Dermatofibromas, also called histiocytomas , are benign dermal nodules that usually appear in the extremities. Dermatofibroma is a common skin lesion, accounting for 3 % of skin lesion specimens received by one laboratory [1]. Most cases occur in the third through fifth decades of life and show female predominance [2]. It represents a benign process with no malignant potential. Dermatofibroma may be associated with history of local trauma. Multiple eruptive dermatofibromas have been noted in patients with systemic lupus erythematosus and HIV [3]. It is unknown whether dermatofibromas are a true neoplasm versus an inflammatory response, and there are several histologic variants of the lesions [1, 2].