Cancer is the growth of abnormal cells in the body. These extra cells grow together and form masses, called tumors. In bladder cancer, these growths happen in the bladder. The bladder is the part of your urinary tract that stores your urine until you are ready to let it out.
Bladder cancer can often be successfully treated if it is found and treated early. And most bladder cancer is found early.
This topic is about the most common type of bladder cancer, called transitional cell cancer. This is cancer that starts in the inner layer of the bladder. It happens most often in people who are in their 60s or older.