The rate at which serum PSA level increases over time Free PSA: PSA in blood serum that is not bound to other proteins (e.g.to 1-antichymotrypsin and macroglobulin) Total PSA: The sum of bound ...

There is a general consensus among clinicians that a serum prostate-specific antigen (PSA) level ≥4.0 ng/ml is predictive of prostate cancer, and necessitates a biopsy. But there is a dearth of ...