Choledochal cysts are now being diagnosed before birth on routine maternal sonography (US). There is no report in the literature outlining the management of newborns with choledochal cysts, many of whom are asymptomatic. Our study details the diagnosis, treatment and outcome of six such children, four girls and two boys. Five had antenatal US revealing cystic abdominal masses. One had intermittent vomiting and US suggested a choledochal cyst. Four of six had normal serum bilirubin levels; two had elevations. In five babies the choledochal cyst was correctly diagnosed from the preoperative studies; in one the preoperative diagnosis was an ovarian cyst. The children underwent an operation at an average of 6 weeks of age (range 5 days to 17 weeks). At exploration, cholangiography showed Alonso-Lej type I cysts in all cases. Treatment consisted of resection of the cyst with Roux-en-Y choledochojejunostomy in five and with a valved jejunal choledochoduodenal conduit in one. In no case was the dissection of the choledochal cyst off the portal vein and hepatic artery difficult. There were no intra- or early postoperative complications. Mean hospital stay was 8 days (range 5 to 9 days). Presently, all 6 patients have normal bilirubin levels at an average length of follow-up of 35 months (range 16 to 70 months) after operation. We conclude that operative treatment of choledochal cysts in early infancy, even in asymptomatic children, is safe and effective and may prevent serious complications later in life.

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