A Choledochal Cyst Combined with a Hilar Cholangiocarcinoma

ABSTRACT

A choledochal cyst, also referred to as cystic dilatation of bile duct, is a relatively rare lesion. Moreover, carcinoma arising from such a choledochal cyst has rarely been reported on. The incidence of carcinoma in choledochal cyst is much higher than that seen for the normal population. The mechanism of carcinogenesis in choledochal cyst is not clear, although reflux of pancreatic juice and stasis of the bile appears to be important factors. To our knowledge, there is no literature reporting on a case of choledochal cyst combined with a hilar cholangiocarcinoma. We report here on a case of choledochal cyst combined with a hilar cholangiocarcinoma in 46-year-old male patient.