prostate-specific antigen

Definition of prostate-specific antigen
National Cancer Institute

prostate-specific antigen

(PROS-tayt-speh-SIH-fik AN-tih-jen)
A protein made by the prostate gland and found in the blood. Prostate-specific antigen blood levels may be higher than normal in men who have prostate cancer, benign prostatic hyperplasia (BPH), or infection or inflammation of the prostate gland. Also called PSA.

Source: NCI Dictionary of Cancer Terms