Direct hyperbilirubinemia Types They were classified into 5 types by Todani in 1977. Classification was based on site of the<unk> or dilatation. Type I to IV has been subtyped. * Type I: Most common variety (80-90%) involving saccular or fusiform dilatation of a portion or entire common bile duct (CBD) with normal intrahepatic duct. * Type II: These<unk>  are present as an isolated diverticulum protruding from the CBD. * Type III or Choledochocele: Arise from dilatation of duodenal portion of CBD or where pancreatic duct meets. * Type IVa: Characterized by multiple dilatations of the intrahepatic and extrahepatic biliary tree. * Type IVb: Multiple dilatations involving only the extrahepatic bile ducts. * Type V:<unk> c dilatation of intrahepatic biliary ducts without extrahepatic duct disease. The presence of multiple saccular or<unk> c dilations of the intrahepatic ducts is known as Caroli's disease. * Type VI: An isolated<unk> of the<unk> c duct is an extremely rare lesion. Only single case reports are documented in the literature. The most accepted classification system of biliary<unk> , the Todani classification, does not include this lesion. Cholecystectomy with<unk> c duct ligation near the common bile duct is curative.
Choledochal cysts
Pancreas divisum
Annular pancreas
Ectopic pancreas
Pancreatic cyst
Accessory pancreas
Biliary atresia
Bile duct hamartoma