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Overview
The prostate is a walnut-sized gland located beneath the bladder and in front of the rectum in men. The urethra (tube that transports urine and sperm out of the body) passes through the prostate to the bladder neck. Prostate tissue produces prostate specific antigen and prostatic acid phosphatase, an enzyme found in seminal fluid (the milky substance that combines with sperm to form semen).

Ultrasound, or ultrasonography, involves using a special device (transducer) that reflects h...Read the full article