Multiple small benign nodules, occurring mostly on the skin of the face, derived from basal cells of hair follicles enclosing small keratin cysts; autosomal dominant inheritance. SYN: Brooke tumor, epithelioma adenoides cysticum, hereditary multiple t.. [tricho- + epithelioma]
- desmoplastic t. a solitary, hard, annular, centrally depressed papule, occurring usually in women on the face, consisting of dermal strands of basaloid cells and small keratinous cysts within sclerotic desmoplastic stroma.
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tricho·epi·the·li·o·ma .trik-ō-.ep-ə-.thē-lē-'ō-mə n, pl -mas also -ma·ta -mət-ə a benign epithelial tumor developing from the hair follicles esp. on the face
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tricho·epi·the·li·o·ma (trik″o-ep″ĭ-the-le-oґmə) [tricho- + epithelioma] a benign adnexal tumor originating in the hair matrix, usually on the face; histologically there are strands of basal cells surrounded by fibrocellular stroma. There are two types, the multiple type and the solitary type. Some authorities consider this to be a subgroup of the trichoblastomas.Medical dictionary. 2011.