The percentage of free prostatic-specific antigen is also useful in men with normal digital rectal examination and serum prostatic-specific antigen between 10.1 and 20 ng/ml.

Objective: The percentage of free prostatic-specific antigen (PSA) has been introduced as a tool to avoid unnecessary biopsies in men with normal digital rectal examination (DRE) and serum PSA between 4.1 and 10 ng/ml. In this series we also analyze its utility in men with normal DRE and serum PSA between 10.