title: [Classification of urinary bladder tumors].
abstract: The paper outlines the topical aspects of the current classification of urinary bladder epithelial tumors. It describes the features of the structure of different histological types of benign and malignant urothelial neoplasias in accordance with the 1999 and 2004 WHO classifications. Difficulties in the microscopic diagnosis of different types of urothelial carcinoma, the specific features of gradation and staging, and possibilities of differential diagnosis are presented.
authors.forename: Iu Iu
authors.initials: IuIu
authors.lastname: Andreeva
authors.forename: L E
authors.initials: LE
authors.lastname: Zavalishina
authors.forename: G A
authors.initials: GA
authors.lastname: Frank
mesh_terms: D018262:Adenocarcinoma, Clear Cell / Q000145:classification / Q000473:pathology; D018253:Adenoma, Villous / Q000145:classification / Q000473:pathology; D002291:Carcinoma, Papillary / Q000145:classification / Q000473:pathology; D018288:Carcinoma, Small Cell / Q000145:classification / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000145:classification / Q000473:pathology; D002295:Carcinoma, Transitional Cell / Q000145:classification / Q000473:pathology; D006801:Humans; D001749:Urinary Bladder Neoplasms / Q000145:classification* / Q000473:pathology; D019459:Urothelium / Q000473:pathology; D014944:World Health Organization