EP24.17: Experience in the diagnosis of endometriosis with ultrasound mapping versus magnetic resonance imaging

To describe the experience in the diagnosis of endometriosis with ultrasound mapping versus magnetic resonance imaging (MRI). Ambispective observational study based on endometriosis mapping data collected at a University Hospital with advanced gynecologic ultrasound unit between 2016 and 2023. Two level III sonographers performed the mapping for endometriosis with the International Deep Endometriosis Analysis (IDEA) group protocol. In addition, pelvic MRI was performed as complementary imaging in indicated cases. A descriptive analysis of the results was performed. A total of 630 patients were evaluated with endometriosis mapping and 84 underwent adjunctive MRI. The findings are seen in table 1. In anterior compartment: 44.2% of abnormal anterior cul-de-sac mobility, 23.3% of right hydronephrosis, 21% of abnormal bladder mobility, 21% of bladder nodule and 18.6% of right ureter dilatation evidenced on ultrasound mapping versus 4.8% of bladder dome nodules and 1.2% of right ureter dilatation on MRI. In the posterior compartment in the ultrasound mapping: 50.8% compromise on the left uterosacral ligament, 42.1% the uterine torus, 28.6% of the right uterosacral ligament, 22.2% of the sigmoid colon, 18.1% of the fornix, 7% of the rectovaginal septum, 5.8% of the rectosigmoid junction and 8% at the rectosigmoid junction compared to the MRI findings where the compromise was seen in a 9.5% of the uterine torus, 7.1% of the rectovaginal septum, 2.3% of the fornix, 1.2% of the right uterosacral ligament, 1.2% of the sigmoid colon and 1.2% of the rectosigmoid junction. In our experience, ultrasound mapping and MRI are complementary tools in the diagnosis of endometriosis.