What is the PSA test?

The PSA test is a blood test that measures the level of PSA in the blood. PSA (Prostate Specific Antigen) is a substance made by the prostate gland, which naturally leaks out into the blood stream. A raised PSA can be an early indication of prostate cancer. However, other conditions which are not cancer (e.g. enlargement of the prostate, prostatitis, and urinary infection) can also cause a rise in PSA.

The PSA test is currently the best method of identifying localised prostate cancer. There are two further recognised methods; digital rectal examination (DRE) and transrectal ultrasound (TRUS).