In cases where a person has a tumor in the bladder, surgical instruments should be inserted into the bladder and the best way is through the urethra. The removal of the bladder tumor through the urethra or urethra (TURBT) is called and the most common surgery for bladder cancer in the early stages. This operation is performed in a hospital. Your doctor will insert an instrument called a resectoscope into your bladder through the urethra.. The resectoscope has a wire loop at the end. Your doctor will use it to remove abnormal tissue or a tumor.