Retrograde intussusception of the efferent limb after a pancreaticojejunostomy.

Retrograde intussusception is exceedingly rare and has not been reported after a pancreaticojejunostomy. Recurrent retrograde intussusception has been reported only once before. In adults retrograde intussusception has been associated with gastric resection, gastrojejunostomy, Roux-en-Y gastric bypass, and gastrostomy tube placement. We report a case of retrograde intussusception of the efferent limb into the anastomosis of a revised Roux-en-Y bypass of the pancreas. Two long side-to-side anastomoses with plication were performed to prevent a third episode of intussusception involving this patient's Roux-en-Y.