Google the article "Radiotherapy with or without androgen deprivation therapy in intermediate risk prostate cancer. "I am put in the unfavorable risk intermediate group because I had two cores from the same area that were 4-3 as others that were 3-4 from the area of the lesion. I had 4 positive cores out of 30 cores taken due to my 100 gram prostate, I also have a PSA of 2.9, and classified as T1C. The article states that if you are over 70 years old there is no difference in biochemical reoccurrence if you don't have ADT. Another article is Proton Bean Therapy Alone for Intermediate- or High-Risk Prostate Cancer: An Institutional Prospective Cohort Study. These may answer your questions. I am scheduled for Proton beam 5 sessions and have my planning visit next week. I am over 70.