Wow...you and your family have been on a roller coaster with this!
Have a couple of questions for you...Usually the BCG regimen is once a week for 6 weeks, and then every three months a maintenance series of one a week for three weeks...continuing for quite a while. How many BCG instillations did your father have?
Think there is a little confusion on some of the terminology...not surprising! He has had several cystoscopies...not cystectomies, which is removal of the bladder. And, from your description, he has had at least one TURB (transurethral resection of the bladder under general anesthesia) where actual biopsies were taken?
The pathology report from the samples taken during the TURB were high grade? Do you have any more information from the pathology report? You should have a copy of this.
The usual procedure, ESPECIALLY WHEN NOT ENOUGH SAMPLE WAS AVAILABLE TO DETERMINE IT IT WAS MUSCLE INVASIVE, is to do a second TURB to determine this. It seems to me that this is one of the most important issues to be determined. IF it were to be muscle invasive, cystectomy (removal of the bladder) would be required ASAP.
How old is your father? Is he able to handle the daily chores of living? While a cystectomy is not a walk in the park, most people who have them adapt well and live a full, CANCER FREE life. There are three primary types of diversions and his life conditions would help to determine which he might choose. I can understand his reluctance to consider it, but it can be the difference between many years of good life and the alternative.
Your dad is fortunate to have someone with your experience on his side. If there is any way that the VA can refer him for a consultation with a high volume urological (bladder cancer, kidney cancer) center, it would be a GOOD IDEA.
Hope I have answered a few of your questions....Am sure that others on this forum will chime in.
Best of luck to you
Sara Anne