I am 67 and my psa has fluctuated from 2.5 to 5.3 prior to the 4.55 reading in 12/23. They did a biopsy back in 2016, nothing at that time. The feeling was that the 4.55 reading was within my "range". MRI scheduled for 12/28) a Saturday, and they will let me know if there is and earlier date. Oh, and I mentioned earlier, my prostate was measured at 60cc back in 2016. God knows what it is now.