Abstract
Choledochal cysts are congenital dilations of the biliary ducts that may be associated with intermittent biliary obstruction. If the condition goes unrecognized and uncorrected, the impaired bile outflow can lead to chronic hepatic injury, fibrosis, and ultimately, biliary cirrhosis. Although typically diagnosed in the pediatric population, as many as 20-30% of choledochal cysts can be discovered in adulthood. There is a female predominance. Unresected choledochal cyst is clearly associated with increased risk of cholangiocarcinoma. Treatment includes surgical removal of the choledochal cyst and bilioenteric anastomosis. In this article, we report two cases of cholangiocarcinoma occurring in an unresected choledochal cyst.
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