Prostate-Specific Antigen (PSA) Test

A Prostate-Specific Antigen (PSA) Test is a blood test used to screen for prostate cancer or to monitor the progression of the disease in men who have already been diagnosed with prostate cancer. PSA is a protein produced by cells in the prostate gland, and elevated levels of PSA may indicate the presence of prostate cancer. The test measures the level of PSA in the blood, and is typically recommended for men over the age of 50 or at higher risk for prostate cancer. It is not a definitive diagnostic tool for prostate cancer, but can help in early detection and monitoring of the disease.