title: Villous adenoma of the urinary bladder: a morphologic or biologic entity?
abstract: Villous adenomas in the urinary bladder are rare neoplasms whose malignant potential is unclear. A case of a morphologically benign non-invasive mucin producing papillary neoplasm of the urinary bladder associated with cystitis glandularis is presented. Absence of A tissue isoantigen from the neoplastic and metaplastic cells and the presence of H tissue isoantigen in both neoplastic and metaplastic cells is observed in a patient whose blood type is A, indicating incomplete maturation of surface coat constituents. The histologically benign appearance of this lesion may belie a malignant potential.
mesh_terms: D000236:Adenoma / Q000150:complications / Q000473:pathology* / Q000601:surgery; D000368:Aged; D003556:Cystitis / Q000150:complications*; D006680:HLA Antigens / Q000378:metabolism; D006801:Humans; D007519:Isoantigens / Q000378:metabolism; D008297:Male; D001749:Urinary Bladder Neoplasms / Q000150:complications / Q000473:pathology* / Q000601:surgery
chemical_list: D006680:HLA Antigens; D007519:Isoantigens