A CT scan tells you that "something" is there. An experienced urologist can make a pretty good guess, but the CT scan does NOT tell you even if it is cancer. And, if it is, a CT scan cannot tell what type (most bladder cancer is transitional cell, but there are others that would be treated very differently), if it is high grade (rapidly dividing) or low grade (more slowly growing), or whether it extends into the muscle. Yes, you need the path report to find all these things out. These issues will all factor into whatever treatment is recommended.
Sara Anne