I had my Prostate removed in 2010. PSA going up and down since then. My high 3.9 Dr said don't worry unless it goes to 4.0 and above. I had Bone scan, Cat scan, PET scan and a pelvic MRI. Oncologist cannot see anything and stated if I can't see anything i can't treat it. PSA went down to 3.3 as of last week. Going for checkup with Oncologist next month. Any ideas?