title: Primary carcinoid tumor of the bladder arising beneath an inverted papilloma.
abstract: We describe a 54-year-old woman with a primary carcinoid tumor of the bladder arising beneath an inverted papilloma diagnosed by light microscopy and immunohistochemical studies. After the patient complained of hematuria and voiding difficulties, a polypoid mass was detected during cystoscopy and removed for examination. The distinctive histologic features of an inverted papilloma were readily identified. The characteristic pattern of a carcinoid tumor was confirmed with immunohistochemical studies.
authors.affiliation: Department of Pathology, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298-0662.
authors.forename: B L
authors.initials: BL
authors.lastname: Stanfield
authors.forename: M M
authors.initials: MM
authors.lastname: Grimes
authors.forename: S
authors.initials: S
authors.lastname: Kay
mesh_terms: D002276:Carcinoid Tumor / Q000737:chemistry / Q000473:pathology*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000737:chemistry / Q000473:pathology*; D010212:Papilloma / Q000737:chemistry / Q000473:pathology*; D001749:Urinary Bladder Neoplasms / Q000737:chemistry / Q000473:pathology*