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Just got my ULTRASENSITIVE P.S.A. back, and this is the reference range "story" that preceeds the results: Less than 0.10 ng/ml AFTER RADICAL PROSTATECTOMY. 4.0 ng/ml OR LESS IN HEALTHY MALES WITHOUT PROSTATECOMY. PSA values obtained with different assay methods or kits cannot be used interchangeably. This test was performed using the DPC IMMULITE 2000 method. PSA, ICMA is not to be used as a diagnostic procedure without confirmation of the diagnosis by another established product or procedure. The lower limit of accurate quantification for this assay is 0.01 ng/mL. PSA values less than 0.01 ng/ml cannot be accurately measured and will be reported as "less than 0.01 ng/mL" Specimens with PSA levels below the lower limit of accurate quantification should be considered as negative. In patients with a negative result for post prostatectomy PSA, serial monitoring of PSA levels at regular intervals, along with physical examinations and other tests, may help to detect a recurrent prostate cancer.
