good to get the biopsy done definitely. also, however, in my experience, my bladder was peppered with what my surgeons always described as "scar tissue" from previous resections. so unless there are some different circumstances then I don't know why your doctor necessarily thinks the site of a resection will always clean up so well. im not a doctor though so I don't know for sure. In addition, BCG is well known for it's ability to irritate the lining of the bladder and cause red spots. I had several investigated during my BCG courses. they have to/should investigate them all as you don't want to miss anything and sometimes the red spots are more than just inflammation. but my money's on it being something like that.
tim