My brother at 77 had Five sessions of SBRT radiation and he’s now 80 and doing fine.

Has it spread beyond the prostate? Is your PSA over 20? Those could require ADT as could the things listed just below. I’m 78 and I’ve been on ADT for eight years. It affects people differently, Some get a lot of fatigue I’ve never had any.

Were any of these things found in the biopsy intraductal, cribriform, Seminal vesicle invasion, EPE or ECE. (Extraprostatic extensions extra capsular extensions). They can make the cancer much more aggressive. This would require more sessions of SBRT or IMRT and maybe even I follow up with brachytherapy.