You can absolutely have a high PSA with a low gleason score. There are a couple of things that can cause this. A large tumor that is nonaggressive, a transition zone tumor, and PC metastisis that has spread to the lymph nodes. High PSA usually is associated with metastisis.
I had a psa of 4.4 in 1999 and steadily increasing psa every 3-6 months before reaching 40 in 5-08.Free psa ranged from 16 to 10%
I had biopsies every year, 13 total in all. I saw 5 different doctors, all urologists or urological oncologists at Long Beach, UCLA, UCSF and UCI and had an MRIS at UCSF in 2007. All tests were negative and I was told that because of all the biopsies I most likely didn't have PC, but to keep getting biopsies every year.
in Oct 08 my 13th biopsy of 25 cores indicated 2 positive cores, gleason 3+3 less that 5% in 2 cores. Doc recommended surgery.
2nd opinion from a prostate oncologist, referred by my wife's oncologists said cancer found wis indolant and statistacally insignificant, but PSA histor was a major concern and ordered a few more tests.
Color Doppler ultrasound with targeted biopsy found a transition zone tumor 18mmX16mm, gleason 3+4 and 4+3. CT and bone scans clear, but Doc thinks that there may be lymph node involvement (30% chance) because of my high PSA, and referred me for a Combidex MRI in Holland, currently scheduled for Feb 14.
Changed diet and takiing supplements while I wait. The location of the tumor plus the high psa make surgery an unlikely option. I'm still evaluatiing all treatment options and will make a decision once I get the results of the Combidex scan.