You definitely need to become armed with information. It sounds like it's speculation at this point. I would argue that since they can't say what type of cancer, then it isn't even definite that it is cancer...since on a biopsy it really isn't that hard to tell the difference between a renal cell carcinoma (kidney) and transitional cell carcinoma (bladder or anything in collecting system from kidney to bladder). If at this point it's just blood in the urine, then it's premature to speculate about cancer...the source needs to be determined and it needs to be verified it is even due to cancer..it could be a variety of benign conditions.
You cannot be lonely if you like the person you're alone with. Dr. Wayne Dyer