The comparison between transperineal and transrectal ultrasound-guided prostate needle biopsy

Abstract

Purpose: Prostate biopsy is a conventional method for the detection of prostate cancer in men with suspicious findings. However, there is no universal agreement on which method is the better approach to the prostate, with regard to cancer detection rate and complication rate. In this prospective randomized study, we compared cancer detection rates and complication rates between transperineal (TP) and transrectal (TR) prostate biopsy. Materials and Methods: Between March 2006 and December 2007, we analyzed 200 Korean men. One hundred patients underwent randomized TP prostate biopsy and 100 patients underwent TR prostate biopsy. All biopsies were extended 12-core biopsies. With both approaches, 12 biopsy specimens were obtained systematically from the peripheral and transitional zones, including the apex, base, and transitional zone. The patient's subjective pain scale was measured by use of visual analogue scales. Immediately after the biopsy, the pain score was independently recorded by the patients. One week later, various complications were measured by answer note. Results: The overall cancer detection rate was 22% (22 of 100 patients) with TR prostate biopsy and 29% (29 of 100 patients) with TP prostate biopsy. Considering the prostate cancer detection rate, there were no significant differences between the groups for prostate-specific antigen (PSA), age, body mass index (BMI), and prostate volume. Apart from the cancer detection rate and complication rate, the pain scale, in each different approach, was statistically meaningful. Conclusions: There were no significant differences in the cancer detection rate or complication rate between TP and TR prostate needle biopsy. However, with regard to pain relief and complication rates, TR prostate needle biopsy is preferable. © The Korean Urological Association, 2009.