Correlation Between Actual and Estimated Prostate Weight by Transrectal Ultrasonography with 14 Separate Methods of Volume Estimation in Patients with Benign Prostate Hyperplasia / 대한비뇨기과학회지

ABSTRACT

A precise estimation of prostate volume with transrectal ultrasound would help to determine the appropriate therapy. To determine the most accurate means of volume estimation 39 patients underwent transrectal ultrasound with 14 separate methods of volume estimation. All patients underwent subsequent suprapubic prostatectomy. Prostate specimen weights were compared with the results of each volume estimation method. The most accurate method to estimate prostate weight (r = 0.94) was the ellipsoid volume formula, widely used as an alternative to planimetry, which overestimated the weight of the prostate in 33 of 39 cases (84.5%) with an average error of 7.5 gm. (13.6%). A large portion of the error in the application of this ellipsoid volume formula was the inclusion of transverse dimension.