title: Multiple adnexal tumors and a parotid basal cell adenoma.
abstract: A 72-year-old woman had a preauricular mass and several scalp nodules. Her medical history included excisions of multiple cutaneous tumors, including cylindromas, trichoepitheliomas, basal cell epitheliomas, and a trichilemmoma. The parotid mass and a scalp nodule were excised. On light microscopy, the parotid mass and scalp nodule appeared similar. Ultrastructural features revealed by electron microscopic analysis of the tumors allowed diagnosis of a cylindroma of the scalp and a parotid basal cell adenoma. The association of trichilemmoma and membranous basal cell adenoma of the parotid has not been previously described. The pathogenesis of these multiple cutaneous tumors from a common cell of origin is considered.
authors.affiliation: Dermatology, Department of Medicine, University of Chicago, IL.
authors.forename: K T
authors.initials: KT
authors.lastname: Schmidt
authors.forename: A
authors.initials: A
authors.lastname: Ma
authors.forename: R
authors.initials: R
authors.lastname: Goldberg
authors.forename: M
authors.initials: M
authors.lastname: Medenica
mesh_terms: D000236:Adenoma / Q000473:pathology*; D000368:Aged; D003528:Carcinoma, Adenoid Cystic / Q000473:pathology*; D005260:Female; D006801:Humans; D008854:Microscopy, Electron; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D010307:Parotid Neoplasms / Q000473:pathology*; D012535:Scalp / Q000473:pathology; D012878:Skin Neoplasms / Q000473:pathology*