Prostate-specific antigen (PSA) is a protein produced by the glandular tissue of the prostate (a walnut-sized gland just below the bladder and in front of the rectum in males). PSA levels can be detected in the blood, urine, or semen. Blood PSA testing is used as a screening test for prostate cancer.
The normal range is between 1.0 and 1.5 ng/ml. An abnormal rise: A PSA score may also be considered abnormal if it rises a certain amount in a single year. For example, if your score rises more than 0.35 ng/ml in a single year, your doctor may recommend further testing. The prostate specific antigen (PSA) test is used to measure blood PSA levels and help detect prostate cancer or other prostate abnormalities. Learn more about the PSA blood test at WebMD.
There is no specific normal or abnormal level of PSA in the blood. In the past, PSA levels of 4.0 ng/mL and lower were considered normal. However, some individuals with PSA levels below 4.0 ng/mL have prostate cancer and many with higher PSA levels between 4 and 10 ng/mL do not have prostate cancer .
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