A bladder is a balloon-shaped organ in the lower abdomen meant to store urine until it is drained out of the body through the urethra.

Bladder cancer grows in the cells that outline the inside of the bladder. Urothelial cells also strive in the kidneys and tubes that adjoin the kidneys to the bladder. So, urothelial cancer may occur anywhere in the kidneys and ureters. But most commonly, it manifests in the bladder.

Commonly, bladder cancers are highly detectable in the early stages as well. So, this widens the scope of treatment. Nonetheless, even after successful treatment, signs of bladder control may come back. Hence, people with bladder cancer may need follow-up tests even after years of treatment to look for cancer that recurs.