title: Malignant dermal cylindroma in a patient with multiple dermal cylindromas, trichoepitheliomas, and bilateral dermal analogue tumors of the parotid gland.
abstract: A malignant dermal cylindroma of the scalp arose from one of multiple long-standing dermal cylindromas in a 76-year-old man with coexisting trichoepitheliomas and bilateral dermal analogue tumors of the parotid gland. The histologic transition from a benign dermal cylindroma to an anaplastic keratinocytic neoplasm was readily apparent. The malignant dermal cylindroma is a rare neoplasm. To our knowledge, the constellation of benign and malignant dermal cylindromas, multiple trichoepitheliomas, and salivary gland neoplasms has not been previously reported.
authors.affiliation: Calgary General Hospital, Alberta, Canada.
authors.forename: N
authors.initials: N
authors.lastname: Rockerbie
authors.forename: A R
authors.initials: AR
authors.lastname: Solomon
authors.forename: T Y
authors.initials: TY
authors.lastname: Woo
authors.forename: T F
authors.initials: TF
authors.lastname: Beals
authors.forename: C N
authors.initials: CN
authors.lastname: Ellis
mesh_terms: D000236:Adenoma / Q000473:pathology*; D000368:Aged; D003528:Carcinoma, Adenoid Cystic / Q000473:pathology*; D006801:Humans; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D010307:Parotid Neoplasms / Q000473:pathology*; D012535:Scalp / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology*