Bladder

Urothelial carcinoma, also known as transitional cell carcinoma (TCC), is the most common type of bladder cancer. These cancers start in the urothelial cells that line the inside of the bladder. Urothelial cells also line other parts of the urinary tract, such as the part of the kidney that connects to the ureter (called the renal pelvis), the ureters, and the urethra. Patients with bladder cancer sometimes have other tumors in these places.