After radiation, the PSA goes down slowly for some people. What you’re looking for is a continuous drop in PSA over time. It may bounce up and down a little bit, but it should continue to drop until it hits the minimum For you. Since everybody’s different, the minimum it gets down to is different for those that have had radiation. It can literally take 2 to 3 years before it hit bottom, Not common, but it happens.

If you had surgery PSA would become undetectable, Unless there was cancer Metastasis somewhere else in the body. The vast majority of people That have had surgery become undetectable, At least for a while.