title: Papillary cystadenoma arising from the upper lip: a case report.
abstract: We report a rare case of a papillary cystadenoma arising from the upper lip. This tumor was not distinctly encapsulated and had proliferated replacing the ductal epithelium. Mast cells were found not only in the stroma but also in the oncocytic epithelial layer. There was a strong immunoreaction with mitochondrial antibody in the epithelial layer. Only one case (0.9%) of papillary cystadenoma has occurred among the 110 benign intraoral salivary gland tumors seen in our hospital from 1966 through September 2003.
authors.affiliation: Oral Health Science Center, Department of Clinical Pathophysiology, Tokyo Dental College, 1-2-2 Masago, Mihama-ku, Chiba 261-8502, Japan. matsuzak@tdc.ac.jp
authors.forename: Kenichi
authors.initials: K
authors.lastname: Matsuzaka
authors.forename: Eitoyo
authors.initials: E
authors.lastname: Kokubu
authors.forename: Eizo
authors.initials: E
authors.lastname: Takeda
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Masaki
authors.initials: M
authors.lastname: Shimono
authors.forename: Takashi
authors.initials: T
authors.lastname: Inoue
mesh_terms: D018292:Cystadenoma, Papillary / Q000473:pathology*; D006801:Humans; D008048:Lip Neoplasms / Q000473:pathology*; D008297:Male; D008407:Mast Cells / Q000473:pathology; D008875:Middle Aged; D012468:Salivary Gland Neoplasms / Q000473:pathology*; D012470:Salivary Glands, Minor / Q000473:pathology