My dad beat the same cause he found it early also beat prostate cancer too. Confined in the bladder its one of the easiest forms to get rid of ,it does reform and its a long process but because its contained they can just chip away at it over a number of years. Its much harder on all involved once its outside the bladder though.

Good luck to him hope he can deal with it mentally too as thats 60% of the battle right there.