The kid said...
Is it possible that one could have prostate cancer and as long as you never get a PSA or DRE test you will never know and it will never affect you?
Yeah, that's a thing for sure. The PSA test does a fair job of detecting prostate cancer when it's there but it is given to false positives. It also detects cancer in men with little dabs of insignificant cancer that will never give them any trouble if they live to be 100. Lots of men are needlessly biopsied and many men receive treatments with horrible side effects (incontinence, impotence, etc.) for a disease that never would have bothered them, all because they had a PSA test and it came back a little bit high.
Of course, there are other guys who do need the treatments and a timely PSA check saves their lives. You never get to know ahead of time which way any given man will go.
So there's that. But, in your dad's case, his PSA is high enough that its pretty clear he needs to know what is going on, especially in light of what his urologist said about
his DRE.