caryg1955 @caryg1955, at a high level, I would personally opt for surgery to remove the known cancer. I was diagnosed 2 1/2 years ago at 55 years old with Gleason 7 (4/3). Just before my biopsy, I remember talking to my wife and sayin --> If this is cancer, I sure hope it is Gleason 6. I would still do the robotic assisted surgery, but Gleason Score 6 would give me a lot more confidence the cancer was contained to the prostate. In the end, I opted for surgery for many reason, below are several.
First, surgery removes all known cancer, versus relying on imperfect imaging tools to direct treatment. I did not want to manage my PSA at a low level but rather have a more definitive PSA/Undetectable PSA test.
Second, I wanted confirmation of the cancer grade and aggressiveness with a physical pathology. So many men find they have more aggressive or additional cancer when the pathology is performed. Today's scanning tools are incredible, but I just did not want to bet my life on them. Excellent example is the reply in this thread from "themurfs" --> His pathology came back significantly higher, but thankfully the cancer had not spread to the lymph nodes.
Third, I wanted to reserve all future treatment options in case the prostate cancer came back (thankfully, PSA undetectable thus far). From my research and referencing medical professionals, it is very difficult or impossible to have surgery after radiation.

I am very high on surgery based on my research and outcome, but surgery is not for everyone in all situation. You need to assess your personal expectations for life going forward and take into account other comorbidities and age. I was healthy, relatively young for prostate cancer (55), positive, and have an expectations for 30+ additional years of cancer free life to spend with my wife, son, and family/friends. I know you are 70 years old, but this should not automatically push you to radiation. You should assess your physical and mental health and overall life expectations.

I pray all goes well with whatever treatment you decide on!!

Jim