Test for cancer cells in urine

How accurate are the tests for cancer cells in the urine? Dr Koch keeps talking about how test after test of my urine didn't show cancer. Dr. Gingrich in Pittsburgh seemed surprised nothing was done after Dr. Jacob found blood in my urine.

If I had any clue it was a symptom of cancer and the bleak outlook of stage 2 cancer, I would have told her either be about finding out what the problem is or I would find a real doctor. She doesn't seem to act like a replacement bladder is any big deal.