Choledochal cyst—classification
Type 1 Fusiform dilatation of bile duct
Type 2 Diverticulum protruding from the wall of the CBD
Type 3 Dilatation of the bile duct within the duodenum (choledochocele)
Type 4A Multiple dilatations of intrahepatic and extrahepatic bile ducts (both)
Type 4B Multiple dilatations involving only the extrahepatic bile ducts
Type 5 Multiple dilatations of intrahepatic bile ducts also called Caroli’s disease
Mnemonic: Fausi dives due 2 extra care