anatomic variant promotes reflux of pancreatic juice into the common bile duct, resulting in inflamma-tion, weakening of the bile duct wall, and dilatation.10 Todani et al12 reported that patients with previous internal drainage developed cancer at a mean age of 35.6 years, approximately 10 years after cystojejunostomy or
cystoduodenostomy. In our se-ries, 8 cases had previous surgery (88.9%).