Im 52 also, had surgery last year. Initially, i was told i was a Gleason 6, and my PSA was 6.8. I got a second opinion (at Mayo, Phoenix), and was "upgraded" to a Gleason 7 (3+4). In my case, i was told surgery was needed due to the cancer pushing against the gland, risking it penetrating the barrier of the prostate . If your PSA is .5, and you're a Gleason 6, rest easy. As mentioned above, some doctors dont even consider a Gleason 6 to be cancer. If i were in your shoes, i'd watch the PSA to see if it starts climbing.