A two year old girl first presented with pancreatitis, subsequently who was found to have a slightly dilated common bile duct. Operative cholangiopancreaticography via gallbladder demonstrated an elongated common channel. Biopsies of the pancreas showed a definite chronic pancreatits. Pancreatitis seen in this patient was supposed to be caused by the bile reflux into the pancreatic duct through the long common channel. Division of the common bile duct and hepaticojejunostomy (Roux-Y) performed, with a satisfactory result. Our new classification of anomalous choledocho-pancreatic junction was proposed as follows Type I consists of cases with elongated common channel. Type II consists of cases with other anomalous ductal junction. Furthermore, Type I was divided into three subtypes. Subtype Ia: cystic dilatation of the bile duct. Subtype Ib: fusiform dilatation of the bile duct. Subtype Ic: no dilatation of the bile duct.
