Discrimination of prostate cancer from benign disease by selective measurements of serum subfractions of free PSA that are not internally cleaved at Lys145-Lys146
Background: The free PSA fraction in serum of patients with various prostatic disorders is essentially unreactive with the anti-proteases in blood. Recently reported data show that it is likely to consist of a mixture of proPSA, internally cleaved PSA forms, and possibly other uncharacterized forms. Currently there are no specific methods available to measure the different free PSA subfractions an