Close
Gastric bypass. Dilation of the hepatobiliary/afferent limb which narrows as it approaches the jejunojejunal anastomosis, after which it enters into a closed loop segment. The closed loop is characterized by thickened and dilated small bowel with two transition points near the JJ anastomosis. The closed-loop segment is long, dilated, and has asymmetric mesenteric edema with some wall thickening. The alimentary limb is not dilated, nor is the jejunum.