pros·tate-spe·cif·ic antigen
Definition of prostate-specific antigen
: a protease secreted by epithelial cells of the prostate gland that is used in the diagnosis of prostate cancer since its concentration in blood serum tends to be proportional to the clinical stage of the disease
—abbreviation PSA
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Time Traveler for prostate-specific antigen
The first known use of prostate-specific antigen was in 1979
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