The test measures the amount of prostate-specific antigen (PSA) in your blood. PSA is a protein produced by both cancerous and noncancerous tissue in the prostate, a small gland that sits below the bladder in men. PSA is mostly found in semen, which also is produced in the prostate. Small amounts of PSA ordinarily circulate in the blood. The PSA test is a blood test used primarily to screen for prostate cancer.
PSA, or prostate specific antigen, is a protein produced by the prostate and found mostly in semen, with very small amounts released into the bloodstream. When there’s a problem with the prostate such as the development and growth of prostate cancer more PSA is released.
|0.0 - 2.5||49 or younger|
|0.0 - 3.5||50 to 59|
|0.0 - 4.5||60 to 69|
|0.0 - 6.5||70 or older|