Bladder cancer refers to any type of malignant growth in the urinary bladder in which abnormal cells multiply uncontrollably in the bladder. The bladder is a hollow organ located in the pelvis that stores urine. The most common type of bladder cancer (90%) originates in the cells that line the inside of the bladder. These cells are called transitional cell carcinomas or urothelial cell carcinomas. In most cases, the muscle...
