I am so sorry to hear that your father has cancer. I, too have a dad with prostate cancer. He had surgery over six years ago and was doing fine. He went five years with no reoccurrence. Then last year, his PSA levels were up again, so he had 37 radiation treatments. This Feb. he went for his PSA test and it was 0.0 untraceable....Thank the Lord.
His urologist says that every man may not die from prostate cancer, but every man with die with it. It is a fact. If you live long enough, you will eventually have it. But they have done more with this type of cancer in the last 10 years, than any other. So there are lots of treatment options that can extend their lives. I'm praying for you.