"type I: obliteration of the common bile duct (patent cystic and common hepatic duct)"
"IIa: obliteration of the common hepatic duct (patent cystic and common bile duct), sometimes with a cyst at the hilum, hence termed cystic biliary atresia"
"IIb: obliteration of the common hepatic duct, cystic and common bile duct"
"type III: obliteration of left and right hepatic ducts at the level of the porta hepatis (most common; 90%)"
"IIb: obliteration of the common hepatic duct, cystic and common bile duct"
"type III: obliteration of left and right hepatic ducts at the level of the porta hepatis (most common; 90%)"