Jejunojejunal intussusception: Case report of a rare complication after internal drainage of pancreatic pseudocyst

Adult intussusception can usually be categorized as postoperative, tumor related or even idiopathic. It was relatively rare in comparison with its childhood counterpart. Postoperative intussusception is usually caused by adhesion, suture lines, bypassed intestine loops or abnormal motility of small bowels. We present a 57-year-old man who had severe alcoholic pancreatitis with pseudocyst formation. Cystogastrostomy and Roux-en-Y cystojejunostomy was created for internal drainage of pseudocyst. However, partial intestinal obstruction occurred as a late complication one year after operation and was found to be intussusception of defunctionalized limb of Roux-en-Y cystojejunostomy through jejunojejunostomy of Roux-en-Y reconstruction into normal jejunum. After manual reduction, resection of this diseased limb was performed and the patient recovered uneventfully. Neither polyps nor lymphadenopathy were found in that segment of the small bowel. The only possible leading point was a fibrotic adhesion band arising from anastomosis of cystojejunostomy to the mesocolon. This was a very rare complication of Roux-en-Y cystojejunostomy that has been reported before.