In response to the original question, my PSA after the operation eventually drifted up into the measurable range (>0.05 in my hospital) but then seemed to stall in the "teens" for well over a year. The consultant said it was conceivable that there was a bit of normal tissue remaining that had regained activity but wasn't going anywhere.
However after about 5 readings the rise got going again, and with a couple of results above the critical 0.2 value I am in line for salvage RT. Currently on hormone therapy. Things have been delayed a bit - a couple of days before the initial oncology consultation I had happened to have a bit of bleeding from the rectum, not experienced before.. I obviously mentioned it when asked, and it meant I got referred for colonoscopy which took a little while (should be rapid, but Omicron) but found a large polyp in the rectum. Discussed with the oncology consultant yesterday. Everything is now delayed more while I await polyp removal and then time for wound recovery before radiotherapy. Essentially it means I need to stay on the hormones longer, but they have brought down the PSA reading so I am hoping the cancer cells have gone back to sleep.
(Polyp not a good thing to have - first it wouldn't be good to spray ionising radiation on tissue that is already not normal, and second the effect of radiation might make it more difficult to remove subsequently).
Anyway Bernster, here's hoping your PSA isn't doing too much. Either staying put, or at least rising so slowly that it can be dealt with with good chance of success.