I just finished the five-treatment proton at Mayo Phoenix. I am two months shy of 74 and I am very similar to you. I had Gleason 4-3 in two cores and Gleason 3-4 in three cores all from the same location of my 120 gm prostate. I had a 30 core MRI fusion guided transperineal biopsy. My PSA was 2.9 and my original MRI showed a 7mm lesion. My three-month post radiation PSA was undetectable. I also did not take the Lupron shot because I had been on TRT since 2008 and when I stop applying the Androgel I go castrate in 60 hours. My radiation oncologist didn't believe me, and he wanted to jab me so bad he could taste it from my opinion before I left the hospital during our initial meeting. He tested me about a month later and I was at 12 ng/dl. All my research shows that ADT makes almost no difference in men over 70 to BCR or overall survival. Why did I stop my testosterone gel? Just hedging my bets, I guess, and I didn't need to take a drug to get the same results. I plan on going back on the TRT in September after visiting my nine-month-old granddaughter. Don't want any testosterone rubbing off on her.