Retrograde intussusception as a complication of Roux-en-Y anastomosis for choledochal cyst--report of one case.

A 19 month-old girl with choledochal cyst received complete cyst excision and biliary reconstruction by Roux-en-Y hepaticojejunostomy. Three months later, intestinal obstruction developed and small bowel intussusception was diagnosed preoperatively by ultrasonography. Laparotomy revealed retrograde jejunojejunal intussusception, involving the distal end of the Roux limb. To best knowledge, this is the first case in a child and the third case having such complication after Roux-en-Y anastomosis, reported in the literature. It should be noted that, if intestinal obstruction develops in a patient who had received this procedure for choledochal cyst, retrograde intussusception, although very rare, should be considered in addition to adhesion ileus.