Prostate-specific antigen (PSA) is a protein made by the prostate gland. A high PSA level could be a sign of an enlarged prostate, inflammation called prostatitis, or prostate cancer. The PSA test ...

This article was reviewed by Darragh O’Carroll, MD. Prostate-specific antigen (PSA) is a term you’ll probably become familiar with once you start getting screened regularly for prostate cancer ...