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Glossary


PSA density
The PSA level divided by the size of the prostateA donut-shaped gland the size and shape of a walnut that surrounds the upper portion of the male urethra. Its main function is to produce part of the fluid that makes up semen.. This allows the doctor to better distinguish between benign prostatic hyperplasia (BPH)Noncancerous enlargement of the prostate gland due to an increase in the number of prostate cells. and prostate cancerUncontrolled growth of the cells of the prostate. by taking prostate size into account when assessing the PSA level.