Skip to Content
Prostate-specific antigen (PSA) is a substance released into a
man's blood by his prostate gland. 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 men. The
amount of PSA in the blood normally increases as a man's prostate enlarges with
age. It is also increased by ejaculation, inflammation of the prostate gland (prostatitis),
and by prostate cancer.
Current as of:
November 20, 2015
E. Gregory Thompson, MD - Internal Medicine & Christopher G. Wood, MD, FACS - Urology, Oncology
To learn more about Healthwise, visit Healthwise.org.
© 1995-2016 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
© Copyright 2017 Rush Copley Medical Center • 2000 Ogden Avenue; Aurora, IL 60504
Main: 630-978-6200 • Physician Referral & Information: 630-978-6700 or 866-4COPLEY (866-426-7539)