Combining the use of a longitudinal real-time transrectal ultrasound scanner (Bruel & Kjaer 8537 7 MHz Sector Scan), an attachable puncture guide (Bruel & Kjaer UA 0875) and the Biopty-Cut apparatus (Radioplast), one can now easily perform all prostatic biopsies with ultrasonic guidance. We evaluated this method in 75 patients and found it to be a most elegant and accurate method for the histological diagnosis of prostate cancer.