A prostate-specific antigen (PSA) blood test measures the amount of prostate-specific antigen in the blood. PSA is released into a man's blood by his prostate gland. Healthy men usually have low amounts of PSA in the blood. The amount of PSA in the blood normally increases as a man's prostate enlarges with age. PSA may increase as a result of an injury, a digital rectal exam, recent (24 hours) sexual activity (ejaculation), inflammation of the prostate gland (prostatitis), or prostate cancer. When combined with a digital rectal exam at your doctor's office, the test increases the chance of detecting prostate cancer. A PSA level within the normal ranges does not mean that prostate cancer is not present. Also, some men with prostate cancer have normal PSA levels.
Preparation: None, aside from the remarks above in red. It is always a good practice to drink plenty of water before a blood draw because being well-hydrated aids in the venipuncture procedure.
For more Information on any of your lab test results
- Consult your physician
- Review the information on the independent, non-profit web site: labtestsonline.org.
These are not intended as diagnostic comments, but only to give you sufficient information for further discussion with your physician. It is important that you promptly consult your physician regarding any abnormal findings.
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