A prostate-specific antigen is a blood test that measures the levels of a protein produced by the cells of the prostate gland. Annual PSA screenings for males over the age of 50 helps to indicate the sign of prostate cancer. PSA is often elevated or rises rapidly in men with this type of cancer.
When to Have a Prostate-Specific Antigen
- Annually for men starting at age 50.
- Annually for men starting at age 45 if you are African American or if your father, brother, or son had prostate cancer before the age of 65.