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Pesapane F., Nazzaro G., Coggi A., Gianotti R.
Unità Operativa di Dermatologia, Dipartimento di Fisiopatologia Medico-Chirurgica e dei Trapianti, Università degli Studi di Milano, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milano, Italia
Dermatofibroma (superficial benign fibrous histiocytoma) consists in a cutaneous nodule that frequently develops on the extremities, more often in women, painful or asymptomatic. The precise etiopathogenetic mechanism remains unknown: rather than a reactive tissue change, the hypothesis that dermatofibroma may be a neoplastic process is demonstrated by its clonal proliferative growth. We report a case of a papule, 0.5 cm of diameter, spontaneously arisen on the first finger of the hand in a 24-year-old man. Histological examination was confident with the diagnosis of dermatofibroma.