Objective: Parastomal hernia (PSH) is a common complication of ileal conduit diversion after radical cystectomy. Novel surgical techniques for preventing PSH formation are needed. We aimed to evaluate surgical technique of extraperitonealizing the ileal conduit (modified ileal conduit) for preventing PSH.
Methods: A retrospective analysis of 375 consecutive patients who underwent ileal conduit after cystectomy at the Sun Yat-sen University Cancer Center between January 1, 2000 and June 31, 2019 was conducted. 214 patients had modified ileal conduit diversion and 161 patients conventional ileal conduit (Bricker) diversion. The demographic and clinicopathologic characteristics of patients in the 2 groups were compared using the t test and Chi square test. Univariable and multivariable Cox regression analyses were used to predict the risk of PSH formation.
Results: The 2 groups were comparable in regard to all demographic and clinicopathologic variables. The incidence of PSH diagnosed by CT scan was 7.5% in the modified group and 21.1% in the conventional group (P < 0.001). High BMI and history of prior abdominal surgery was identified by univariable analysis as risk factors of PSH formation. Multivariable analyses revealed that technique of extraperitonealizing ileal conduit significantly reduced incidence of PSH in patients with or without risk factors of PSH formation (OR = 0.29, 95% CI 0.16-0.54, P < 0.001).
Conclusions: Technique of extraperitonealizing ileal conduit appeared to be effective in reducing PSH formation after ileal conduit diversion.
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