title: [Dermal nerve sheath myxoma. (Neurothekeoma)].
abstract: A 59-year-old male presented with a painful nodule on the interscapular area of 20 year duration. The microscopic examination showed a myxomatous lobulated tumor composed of dendritic fusiform cells with some epithelioid and multinucleated cells typical of a nerve sheath myxoma. Immunohistochemical analysis demonstrated reactivity for S100 protein. Neither factor XIIIa nor epithelial membrane antigen (EMA) expression was found in the tumor cells. These findings suggest a schwannian origin for this tumor.
authors.affiliation: Clínica de Dermatologia, Hospitais da Universidade, Coimbra.
authors.forename: O
authors.initials: O
authors.lastname: Tellechea
authors.forename: J P
authors.initials: JP
authors.lastname: Reis
authors.forename: A P
authors.initials: AP
authors.lastname: Baptista
mesh_terms: D006801:Humans; D008297:Male; D008875:Middle Aged; D009232:Myxoma / Q000473:pathology*; D009423:Nervous System Neoplasms / Q000473:pathology*
vernacular_title: Mixoma dérmico das bainhas nervosas. (Neurotecoma).