Diseases

Type -3 Caroli’s Disease (Choledochal Cysts)

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Choledochal cysts are congenital bile duct anomalies (see the image below). These cystic dilatations of the biliary tree can involve the extrahepatic biliary radicles, the intrahepatic biliary radicles, or both. Computed tomography (ct) scan of a choledochal cyst involving the common hepatic duct.

Choledochal cysts are classified into 5 types, based on site of the cyst or dilatation.
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: 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 or caroli's disease: cystic dilatation of intra hepatic biliary ducts