Endoscopic retrograde cholangiopancreatography (ERCP) in a patient with choledochocele

In this 14-year-old boy with documented recurrent acute pancreatitis, MRCP revealed cystic dilation of the major papilla, due to a choledochocele (type III biliary cyst), in which the cyst is located within the duodenal wall. ERCP revealed a bulging and long intraduodenal segment of the major papilla (panel A). Biliary sphincterotomy was performed (panel B), and no stones and no sludge were found in the bile duct.