My dad has hormone resistant prostate cancer and also CIS cancer of the bladder. He already tried BCG last year and it didn't work. He doesn't want to try it again. The CT scan already showed a mass behind the bladder but they don't know if it's from the bladder or prostate. How long will it take his CIS to get out of the bladder without treatment (hasn't done anything for it in a year) and what is the usual length of life after it has left?