Entering the duodenal diverticulum：A method for cannulation of the intradiverticular papilla

Successful cannulation of the common bile duct may be difficult in patients in whom the papilla is located entirely within a diverticulum.In this study,we report successful biliary cannulation in three patients following intubation of the distal tip of the duodenoscope into the duodenal diverticulum and locating the major papilla.No complications occurred during the operation or during the postoperative period.This method didn＇t need second incubation an endoscope and might lower the burden of patients.So this skill is useful to deal with the papilla hidden inside the large diverticulum because of its safety and convenience.