Abnormalities in the bladder and kidneys may be detected through physical exam, imaging tests of bladder or kidney function, or by tests on your urine or blood. Most often by the time symptoms become apparent, the cancer is beyond its earliest stage. PET scanning may help by determining the stage of the cancer immediately after it is found so that the most appropriate therapy can be given.
A PET scan can show where tumor cells are growing, which helps your doctor determine the best course of treatment.