SONOGRAPHIC DIAGNOSTIC OF PROSTATE-CANCER

In 75-80% of all clinically significant prostate cancer, the periphera l zone appears to be hypoechoic on transrectal ultrasound (TRUS). Howe ver, examination by TRUS alone in a screening program is not recommend ed due to its low sensitivity. The combination of prostate-specific an tigen, digital rectal examination, and TRUS increases the detection ra te of prostate cancer. In prostate cancer arising from the transition zone, TRUS findings are often nonspecific. Even prostate biopsies migh t be negative due to the location of this tumor. Anterior biopsies of the transition zone will identify these prostate cancers. Color Dopple r ultrasound of the prostate has little additional value over TRUS alo ne in the diagnosis of prostate cancer.