Choledochal cyst (type IV)

Case contributed by Dr Wael Nemattalla


10 year old male with jaundice and vague upper abdominal pains.

Patient Data

Age: 10 yrs
Gender: Male

Case Discussion

Choledochal cysts are congenital conditions associated with benign cystic dilatation of bile ducts. They are uncommon in western countries but not as rare in East Asian nations like Japan and China.

They were classified into 5 types by Todani in 1977.

Classification was based on site of the cyst or dilatation.

  • Type I: Most common variety involving sacular 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 IV: Dilatation of both intrahepatic and extrahepatic biliary duct.
  • Type V or Caroli disease: cystic dilatation of intra hepatic biliary ducts.


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Case information

rID: 7554
Published: 9th Nov 2009
Last edited: 16th Jul 2018
Inclusion in quiz mode: Included

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