Surgery best if cancer contained in the gland, looking at your stats it should be,
Things to watch out for are side effects ie surgery, possible ED and urinary issues , not always and sometimes they clear up over time
Radiotherapy, no major issues , some problems during treatment but these tend to go away after treatment finishes . If on HT as well then more likely to have side effects but again tend to go away over time although HT can be offered for some considerable time.
One downside to RT is that surgery very difficult if cancer returns RT after surgery is OK /
Age 75 is the usual cut-off for prostatectomy, but it can be less if the person isn't very fit, or has other health problems. Prostatectomy is major surgery right in the middle of the abdomen, and will take time to recover from. It has a higher risk of urinary incontinence and erectile incontinence. He should ask what these risks are in his case.
Radiotherapy is less taxing on the body, but the associated hormone therapy is taxing for some men, so I would ask how long he would need to be on it.
