Choledochal cysts - type IVa
25 Y/O female with abdominal pain and jaundice.
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Multiple intrahepatic cysts and a large extrahepatic cyst ralated with biliary tree.
The findings are compatible with choledochal cysts ( type IVa ).
Choledochal cysts can be classified into five types1 :
- type 1 cyst : is most common, accounting for 80 - 90% of cases. It is divided into
- type 1A - cystic dilatation of the common duct
- type 1B - focal segmental common duct dilatation
- type 1C - fusiform dilatation of the common bile duct.
- type 2 cyst : accounts for about 2% of cases and consists of a true diverticulum arising from the common duct.
- type 3 cyst : accounting for 1 - 5% of cases, consists of a choledochocele, and involves only the intraduodenal portion of the duct.
- type 4 cyst : is divided into
- type 4A : multiple intrahepatic cysts and an extrahepatic cyst, which accounts for 19% of cases
- type 4B : multiple extrahepatic cysts, which are much less common.
- type 5 cyst, or Caroli’s disease, consists of single or multiple intrahepatic biliary cysts. Approximately two-thirds of patients with Caroli’s disease also have extrahepatic disease.
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