RT Journal Article SR Electronic T1 39 Pelvic perionteal thickeninig on ultrasound: different pathologies from benign to malignant ones JF International Journal of Gynecologic Cancer JO Int J Gynecol Cancer FD BMJ Publishing Group Ltd SP A288 OP A288 DO 10.1136/ijgc-2024-ESGO.559 VO 34 IS Suppl 1 A1 Elagwany, Ahmed Samy YR 2024 UL http://ijgc.bmj.com/content/34/Suppl_1/A288.2.abstract AB Introduction/Background Peripheral thickening on ultrasound has many causes . It can be benign or malignant ones .Methodology We are aiming here to present some causes of Peritoneal thickening on ultrasound with their different causes . This will be presented based on ultrasound imaging and criteria based on extend of thickening, regularity of thickening, vascularity and associated findings .Results The thickening can be caused by edema as in pelvic infections which is diffuse and smooth with limited vascularity, edema postoperative is vascular while the malignant one with implants is commonly seen as irregular, vascular and invasive ones .Conclusion Ultraosund can differentiate between different causes of peritoneal pathologies including inflammatory edema, postoperative edema or malignant infiltration.Disclosures None.