Prostate-specific antigen (PSA) is something made by the prostate gland. High PSA levels may be a sign of prostate cancer, a noncancerous condition such as prostatitis, or an enlarged prostate gland. This is a test that screens for prostate cancer, it measures the amount of prostate-specific antigen (PSA) in your blood
High PSA levels could be a sign of prostate cancer or a different condition like prostatitis or an enlarged prostate.
Other things can affect your PSA level: