Re: Kidney/bladder cancer
The CT scan is not 100% - tumors and masses can hide behind organs and other tissues. The cystoscopy can see what else may be causing the bleeding - and they can do a biopsy at the same time. I would go if I were you but I also would try not to worry until you get results, it can be other things that are causing these symptoms - ulcers, damaged ureter or kidney, stone not seen on CT. Hearing that it may be cancer is scary but they are just trying to gve you worse case.
Good luck and please let us know what you do and how you make out!