Source:http://linkedlifedata.com/resource/umls/id/C0201544
NCI: The determination of the prostate specific antigen present in a sample.,NCI: A measurement of the prostate specific antigen in a biological specimen.,NCI: A laboratory test that measures the amount of prostate-specific antigen (PSA) found in the blood. PSA is a protein made by the prostate gland. The amount of PSA may be higher in men who have prostate cancer, benign prostatic hyperplasia (BPH), or infection or inflammation of the prostate.