Surgical Management of Urinary Tract Endometriosis: A 1-year Longitudinal Multicenter Pilot Study at 31 French Hospitals (by the FRIENDS Group).

To describe the surgical management and risks of postoperative complications of patients with urinary tract endometriosis in France in 2017. Multicenter retrospective cohort pilot study. Departments of gynecology at 31 expert endometriosis centers. All women managed surgically for urinary tract endometriosis from January 1, 2017, to December 31, 2017. We distinguished patients with isolated bladder endometriosis or isolated ureteral endometriosis (IUE) from those with endometriosis in both locations (mixed locations [ML]). Surgeons belonging to the French Colorectal Infiltrating Endometriosis Study (FRIENDS) group enrolled patients who filled a 24-item questionnaire on the day of the inclusion and 3 months later. Data were collected on operative routes, surgical management, and postoperative complications according to the Clavien-Dindo classification in a single anonymized database. A total of 232 patients from 31 centers were included. Isolated bladder endometriosis was found in 82 patients (35.3%), IUE in 126 patients (54.4%), and ML in 24 patients (10.3%). Surgery was performed by laparoscopy, laparotomy, or robot-assisted laparoscopy in 74.1%, 11.2%, and 14.7% of the cases, respectively. Among the 150 ureteral lesions (IUE and ML), 114 were managed with ureterolysis (76%), 28 with ureteral resection (18.7%), 4 with nephrectomy (2.7%), and 23 with cystectomy (15.3%). Concerning bladder endometriosis, a partial cystectomy was performed in 94.3% of the cases. We reported 61 postoperative complications (26.3%): 44 low-grade complications according to the Clavien-Dindo classification (18%), 16 grade III complications (7%), and 1 grade IV complication (peritonitis). The surgical management of ureteral and bladder endometriosis is usually feasible and safe through laparoscopic surgery. Ureteral resection, when necessary, is more strongly associated with laparotomy and with more complications than other procedures. Prospective controlled studies are still mandatory to assess the best surgical management for patients.

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