LAUSR

Introduction/Background Obturator nerve originates from L2–L3 and enters the pelvic cavity after piercing the medial border of the psoas muscle. It is located along the retroperitoneum within the obturator fossa. Finally it leaves the pelvis through the obturator foramen and innervates the medial thigh adductor muscles. Although rare, obturator nerve injury complicating major pelvic oncologic surgery can occur. Methodology Retrospective review of a series of four cases of obturator nerve injury during oncological surgery. Results The Oncology Gynecology Department performed 1.226 pelvic lymphadenectomies between January 2000 and December 2018. The incidence of obturator nerve injury in oncological surgery in our Department is 0.32% (4/1.226). Four cases’ most relevant data are summarized in the attached table. Conclusion Inmediate laparoscopic repair of a transacted obturator nerve during gynaecologic surgery is feasible and could prevent or reduce the severity of the postoperative neurological injury. Disclosure Nothing to disclose. Abstract EP713 Table 1 Cases of obturator nerve injurie during oncology surgery in our Oncology Ginecology Department Tumor (FIGO stage) Age Primary treatment Surgery and approach Diagnosis Treatment Postoperative evolution Clear cell borderline tumor (IA) 40 Surgery Laparoscopic debulking surgery Intraoperative Intraoperative termino-terminal suture and rehabilitation Postoperative immediate: monoparesia of the lower right extremity. Conserved sensitivity. Normal ambulation. 1 month postoperative: Right psoas 3/5, hip adductors 3/5. Mucinous adenocarcinoma of the cervix (IIB) 49 RT-QMT Laparoscopic radical pelvic and para-aortic lymphadenectomy Intraoperative Intraoperative termino-terminal suture and rehabilitation Immediate postoperative: mild hypoesthesia in the right groin. Right adductors: force 4/5. 3 months postoperatory: normal. Squamous carcinoma of the cervix (IIB) 59 RT-QMT Laparoscopic radical pelvic and para-aortic lymphadenectomy Intraoperative Intraoperative termino-terminal suture and rehabilitation Immediate postoperative: cramming of the proximal anterior left thigh. Paresia adduction left lower limb. 4 months postoperatory: normal Synchronous tumor: endometrial adenocarcinoma and ovarian endometrioid adenocarcinoma (IC) 48 Surgery Laparotomic radical hysterectomy, double adnexectomy, pelvic and para-aortic lymphadenectomy and omentectomy Intraoperative Intraoperative termino-terminal suture and rehabilitation Fifteen months: pain. Hypoalgesia and hypoesthesia, of the anterior and lateral side of the right lower extremity. Motor difficulty for flexion and extension.