@cadaddy
If you can go six months undetectable while on ADT then stopping it is definitely an option you can pursue. You should get blood test every month for a while to make sure it doesn’t come right back.

If you had one core of Gleason nine, you are a Gleason nine. None of the other numbers count the doctors only count the highest number. Because you are a Gleason 9 your cancer is much more aggressive and much more likely to come back. That is why you want to go for one year before stopping ADT. They usually recommend 18 to 24 months with somebody that has a Gleason nine.

There’s some things you don’t mention. Was anything else found in the biopsy? Did you have intraductal, cribriform, Seminal vesicle invasion (SVI). ECE or EPE? If so, your cancer is more aggressive so you want to be on ADT longer.