Evaluate MRI criteria for involvement of the posterior inferior wall of the bladder in patients with endometrial bladder disease.

PURPOSE: to retrospectively evaluate on MRI the local staging with assessment of ureteral orifices extension in bladder endometriosis./ MATERIALS AND METHODS: Institutional review board approval for this study was obtained and waived written informed consent. The MR images of 39 patients operated for bladder endometriosis over a 6 years period in 3 university Lyon hospitals were reviewed. Two experienced readers reported the vesical repletion volume, the largest lesion size, the location and extension of the lesion within the bladder wall, the distance between the ureteral orifices and the lesion when the vesicovaginal wall was involved, the presence of muco-sub mucosal complex edema and the association with external adenomyosis. MR images were compared with surgical and pathological findings. Efficacy parameters were calculated with 95% confidence interval (CI).

Inclusion Criteria:

• Patient operated for pelvic endometriosis with bladder resection.
• Performing a preoperative pelvic MRI with at least 2 perpendicular T2 planes

Exclusion Criteria:

• Refusal to use clinical data and exploration acquired
• Absence of interpretable preoperative pelvic MRI

Patients treated in the gynecological surgery departments of the University Hospital Center of the Civil Hospitals of Lyon: Lyon Sud.