A malignant neoplasm derived from the transitional epithelium of the urinary tract (urinary bladder, ureter, urethra, or renal pelvis). It is frequently papillary. The disease is MONDO_0040679 (urothelial carcinoma). Also known as: Uroepithelial carcinoma, transitional cell car. -uroth., transitional cell carcinoma of the urinary tract, transitional cell carcinoma of the urothelial tract.