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Narrowing of the Proximal Jejunal Limbs at Their Passage Through the Transverse Mesocolon: A Potential Pitfall of Laparoscopic Roux-en-Y Gastric Bypass

¹ Department of Radiology, The Albert Einstein College of Medicine of the Montefiore Medical Center, J. D. Weiler Hospital, 1825 Eastchester Rd., Bronx, NY 10461.
² Department of Surgery, The Albert Einstein College of Medicine of the Montefiore Medical Center, Bronx, NY 10461.

OBJECTIVE. We reviewed images obtained in patients who had recently undergone laparoscopic Roux-en-Y gastric bypass procedures, noting radiographic appearances and possible complications.

CONCLUSION. 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.

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