The urinary bladder.
D000818:Animals; D002295:Carcinoma, Transitional Cell / Q000000981:diagnostic imaging / Q000662:veterinary*; D004283:Dog Diseases / Q000000981:diagnostic imaging*; D004285:Dogs; D008297:Male; D001743:Urinary Bladder / Q000000981:diagnostic imaging; D001749:Urinary Bladder Neoplasms / Q000000981:diagnostic imaging / Q000662:veterinary*; D014567:Urography / Q000662:veterinary