VP59.50: Diagnostic accuracy of the ultrasound ovarian sliding sign for prediction of need to perform laparoscopic ureterolysis and pelvic sidewall adhesiolysis in women with suspected endometriosis

To determine whether a negative ovarian sliding sign is significantly associated with the need for performing laparoscopic ureterolysis and/or pelvic sidewall and bowel adhesiolysis with suspected endometriosis. Multicentre retrospective diagnostic accuracy study (Oct 2019–Jan 2020) which included women with pelvic pain/suspected endometriosis. All women underwent a detailed TVU according to the International Deep Endometriosis Analysis group statement. Ovarian mobility was assessed during real-time TVU using the ovarian sliding sign technique. The performance of the ovarian sliding sign to predict the need for ipsilateral ureterolysis, pelvic sidewall adhesiolysis, bowel adhesiolysis at laparoscopy was evaluated. Complete TVU and surgical data was available for 66 women. Surgical findings were 26/66 (40%) isolated peritoneal endometriosis, 15/66 (23%) endometrioma, 13/66 (20%) deep endometriosis and 13/66 (20%) POD obliteration. 23/66 (35%) required ureterolysis and 31/66 (47%) pelvic sidewall/bowel adhesiolysis. Table 1 displays the diagnostic accuracy for the ovarian sliding sign and surgical procedures. A negative ovarian sliding sign at TVU was significantly associated with the need for right ureterolysis, ipsilateral pelvic sidewall adhesiolysis and bowel adhesiolysis. The high NPV for the ovarian sliding sign suggests that women with a mobile ovary at preoperative TVU are less likely to require complex laparoscopic pelvic sidewall surgery. VP59.50: Table 1. Sensitivity (%) Specificity (%) PPV (%) NPV (%)