Hello @fighting50 and welcome to Mayo Connect. No experience with Mitomycin here, as it was not yet approved for bladder cancer when my husband's urologist wanted to try it. The doctor was eager to use it and see positive results, but my husband's cancer was highly aggressive and initially muscle invasive, though the later recurrences were not. It looks like it has good percentages of success in intermediate to low grade BC. I understand that it is similar to BCG in side effects. Good luck with it and I hope you get some feedback here from others who have experience with it.