A novel anterior approach that involves Retzius space development between the umbilical ligaments is associated with a lower incidence of postoperative inguinal hernia in robotic radical prostatectomy.

ABSTRACT

Background: To facilitate robotic radical prostatectomy (RP), we developed a novel anterior approach that utilizes a peritoneal incision between the umbilical ligaments to develop the Retzius space without contacting the internal inguinal rings, followed by closure of this space prior to prostatectomy and vesicourethral anastomosis. This approach could decrease the incidence of postoperative inguinal hernia (IH), similar to a Retzius-sparing RP (RS-RP). We compared the incidence of IH following this novel approach with that following conventional anterior RP and RS-RP. Methods: We retrospectively reviewed 532 patients who underwent robotic RP from September 2017 to August 2022. We compared the incidence of IH following novel anterior RP (n = 153) to that following conventional anterior RP (n = 284) and RS-RP (n = 95). We also assessed the independent factors associated with postoperative IH using Cox hazard models. Results: The 12- and 24-month cumulative incidences of postoperative IH following novel anterior RP were 1.3% and 1.3%, significantly lower than those associated with conventional anterior RP (8.0% and 12.6%, p = 0.009) but not significantly different from those following RS-RP (1.1% and 2.1%, p = 0.782). In multivariate analysis, use of the novel anterior RP approach, RS-RP, and body mass index were independent factors negatively associated with the occurrence of postoperative IH. Conclusions: This novel anterior approach involves developing the Retzius space between the umbilical ligaments and closure of this space following prostatectomy and vesicourethral anastomosis. It can decrease the incidence of IH compared to the conventional anterior approach. Prospective comparative studies are necessary to confirm the benefits of this approach.