Narrowing of the proximal jejunal limbs at their passage through the transverse mesocolon: a potential pitfall of laparoscopic Roux-en-Y gastric bypass.

Abstract

We reviewed images obtained in patients who had recently undergone laparoscopic Roux-en-Y gastric bypass procedures, noting radiographic appearances and possible complications. In five (45%) of 11 patients, we observed a focal area of circumferential narrowing of the proximal jejunal Roux-en-Y loop. This narrowing corresponded to the site of multiple circumferential sutures from the edge of the hiatus created in the transverse mesocolon to the serosa of the traversing jejunal Roux-en-Y loop as the latter courses superiorly to join the gastric pouch. This narrowing should not be confused with localized ischemia or another disease process.