1St Psa After Robotic Surgery

I had my prostate removed in Oct 2003. PSA before surgery was 14. No sign of cancer external to the prostate upon explanation of lymph nodes, vessels, tissue in that area at time of surgery. First PSA test after 8 weeks was PSA down to 0.0.  Unlike radiation, surgery SHOULD cut PSA to almost zero, under PSA of 0.1   I strongly suspect the lab made a mistake. Have a repeat high sensitivity PSA test done at a major cancer hospital, NOT at a conventional blood analysis storefront....   Good luck .