Anomalous pancreaticobiliary ductal junction without dilatation of the choledochus

A case of anomalous pancreaticobiliary ductal junction is reported in which the choledochus was not dilated but had significant histopathologic changes in its wall. This case suggests that early operative resection of the choledochus is indicated even if choledochal dilatation is minimal in order to prevent the occurrence of carcinoma in the long term.