Yes PSA. It should be zero if they got it all. The test cant measure to zero though so mine in less than .06 milliwhateverparts per whatever. It's where it needs to be is all I know. The cancer had moved out of the prostate some and is why we are monitoring it closely. Prostate specific antigen Is what PSA stands for so it is easy to measure because it is only produced by prostate cells so if the PSA "bounces" it means they didn't get it all. This will go on at lesser intervals for 7 more years and after 10 they call it good.