Mesenteric Defects after Gastric Bypass ANTECOLIC LRYGBPeterson’s defect: The sub-colic space behind the alimentary limb, exposed when the transverse colon is lifted up (1) Jejunal mesenteric defect:Exposed by lifting to the side the JJ-anastomosis to show the mesenteric defect under the free edge of the biliopancreatic limb (2)This is the commonest site Video of closure using Clips: https://artofsurgery.net/wp-content/uploads/2020/10/464_2017_5415_MOESM1_ESM-2.mp4 RETROCOLIC