Analysis of transrectal and suprapubic ultrasonography for prostate size evaluation

Objective The aim of this study is to evaluate the correlation between suprapubic ultrasonography (SPUS) and transrectal ultrasonography (TRUS) in the measurements of prostate dimensions and volume. Materials and methods A total of 90 patients presenting with prostate enlargement and lower urinary tract symptoms were enrolled. All SPUS and TRUS were performed by a single experienced urologist at the same clinic visit. We analyzed the correlations of prostate volume measured by SPUS and TRUS using the Pearson correlation coefficient. Data were further analyzed in the subgroups to determine the correlation between uroflowmetry, prostate volume, postvoid residue, and prostate specific antigen level and the presence of intravesical growth. Results The mean prostate volume of the 90 patients measured by SPUS and TRUS were 65.8 ± 46.5 mL and 65.4 ± 43.9 mL, respectively ( r = 0.944; p < 0.001). The anteroposterior diameters had the strongest correlation among dimension measurements ( r = 0.874; p < 0.001). SPUS and TRUS measurements had better correlation in the prostate size larger than 50 mL. Conclusion There was a strong correlation of prostate sizes measured by SPUS and TRUS. We believe that SPUS can be a reliable alternative for TRUS, especially in the patients with anal diseases. It can shorten the examination time and make the patient more comfortable.