Browse this site http://www.urologyspecialistsnc.com/ for more information on Urologist. An elevated or change in Prostate Specific Antigen (PSA) level. Typically, very little PSA is found in the bloodstream. When there is a change or higher level of PSA in the blood, an Urologist can determine the cause. The PSA test is often used as a way to detect early prostate cancer. Follow us: http://urologistnc.wordpress.com