Prostate-specific antigen, or PSA, is a protein produced by the cells of the prostate gland. This test measures the level of PSA in the blood. It’s normal to have a small amount of PSA in your blood, and the amount rises slightly as you get older and your prostate gets bigger. A raised PSA level may suggest you have a problem with your prostate.

This is what the test will measure:

Prostate-Specific Antigen Test (PSA)

Detecting certain types of prostate cancer early can be critical. Elevated PSA results may reveal prostate cancer that's likely to spread to other parts of your body (metastasize), or they may reveal a quick-growing cancer that's likely to cause other problems. Catching it early provides the best outcomes.