If prostate is removed and the surgery is successful the PSA will remain undetectable. If, however, the surgery was not successful and the cancer returns the PSA will begin to rise. This actually applies to any of the treatment modalities except that they may not have nadirs of 0.00.
Diagnosed Feb 2001 (Age 65) Currently 71
Gleason 3 + 3 = 6
Completed Proton therapy @ Loma Linda - Aug 2001
5yr PSA 0.17
Have had no side effects.