Purpose: The dorsal vascular complex (DVC) of the prostate is considered to be a functional structure having smooth muscles that are connected to the detrusor apron. We conducted this study to provide basic information regarding DVC size as measured by magnetic resonance imaging and to investigate whether DVC size is related to the recovery of continence following radical prostatectomy (RP).
Methods: We prospectively collected data that included the results of prostate MRI and continence recovery of patients who underwent RP. From April 2006 through February 2010, 862 patients underwent RP. Of these, a total of 731 cases were included in the final analysis. The height and width of the DVC were measured in the T1-weighted axial image at the level that showed the puboprostatic ligament.
Results: The continence rate of the total patient cohort at 12 months was 96.7 %. The mean width, height and area of the DVC were 2.0 ± 0.4 cm, 1.2 ± 0.3 cm and 1.8 ± 0.6 cm(2), respectively, and there was no linear correlation between continence recovery and these parameters. However, the patients who had a moderately large-sized DVC (2.3-2.8 cm(2)) regained their continence significantly sooner (mean duration = 2.1 months) than those with small (3.7 months, p = 0.002) or extremely large DVC (4.0 months, p = 0.006). In a multivariate analysis, DVC size, age, transfusion and the length of membranous urethra were significant predictors of continence recovery.
Conclusion: The patients who had a moderately large DVC regained continence faster following RP.