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Prostate-specific antigen (PSA) test

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Prostate-specific antigen (PSA) test

Prostate-specific antigen (PSA) is a substance released into the blood by the prostate, which is part of the male reproductive system. A PSA test measures the amount of prostate-specific antigen in the blood.

Low amounts of PSA may be found in the blood of healthy people. The amount of PSA in the blood normally increases as the prostate enlarges with age. It is also increased by ejaculation, by inflammation of the prostate gland (prostatitis), and by prostate cancer.

Current as of: October 25, 2023

Author: Ignite Healthwise, LLC Staff

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This information does not replace the advice of a doctor. Ignite Healthwise, LLC, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.

NOTICE: This health information was not created by Columbia University Irving Medical Center and may not necessarily reflect specific CUIMC practices. For medical advice to your personal condition, please consult your doctor. Medical advice disclaimer.