Traumatic rupture of a choledochal cyst masking as a duodenal hematoma.

Choledochal cysts are rare, congenital malformations of the intra and/or extrahepatic biliary tree. We describe a case in which a patient was transferred to our hospital with a reported duodenal hematoma. The patient ultimately required exploration when his condition deteriorated. Laparotomy resulted in the discovery and successful treatment of a ruptured type IV-A choledochal cyst.