Prognostic significance of undetectable ultrasensitive prostate-specific antigen nadir after radical prostatectomy.

Objectives: To investigate the prognostic significance of undetectable ultrasensitive prostate-specific antigen (PSA) nadir in patients who received radical prostatectomy (RP) for prostate cancer.

Methods: We reviewed records of 384 patients who received RP for prostate cancer and were followed for at least 2 years with ultrasensitive PSA testing. Undetectable ultrasensitive PSA level was defined as <0.