Excision of a choledochal cyst and simultaneous hepatic lateral segmentectomy.

We treated a 4-year-old girl with a choledochal cyst (CC) with bilateral intrahepatic involvement. A severe stricture between the enormously dilated left intrahepatic bile duct and the dilated common hepatic duct was found; this necessitated prophylactic hepatic lateral segmentectomy together with excision of the CC to avoid possible stone formation in the cystically dilated left intrahepatic duct. The choice of the combined procedures was based upon long-term results of other patients in our experience. This is the first such procedure to be reported.