[Granular cell tumors of the skin of nonneural origin: report of 8 cases]. / Tumeurs à cellules granuleuses de la peau d'origine non nerveuse: étude de 8 cas.

ABSTRACT

We report six cases of benign fibrous histiocytoma, one case of dermatomyofibroma, one case of cutaneous leiomyosarcoma with a granular cell component. Besides the clinical, histologic and immunohistochemical features of the primary lesion, these tumors do not express S100 protein in contrast to the classic granular cell tumor described by Abrikossoff. Such a component has no implication in prognosis, which remains related to the main lesion. Ignorance of this rare event can lead to misdiagnosis, requiring a total revision of the granular cell tumor entity.