"Ia: dilatation of extrahepatic bile duct (entire)"
"Ib: dilatation of extrahepatic bile duct (focal segment)"
"Ic: dilatation of the common bile duct portion of extrahepatic bile duct"
"type IVa: fusiform dilation of the entire extrahepatic bile duct with extension of dilation to the intrahepatic bile ducts"
"type IVb: multiple cystic dilations involving only the extrahepatic bile duct"
"Type I"
"Type II"
"Type IV"
"Type V"
"Type VI"
Expected headings
"Traditional classification"
"Type I"
"Type II"
"Type III"
"Type IV"
"Type V"
"Additions to the classification"
"Type VI"
"History and etymology"