Standard reconstruction after choledochal cyst excision is by Roux-en-Y hepaticojejunostomy to the common hepatic duct. Long-term follow up studies have shown a 10% incidence of late complications, including anastomotic stricture. By extending the bilio-enteric anastomosis along the left hepatic duct, a wide hilar bilio-enteric anastomosis is created which may help to minimize late anastomotic complications. Forty-one consecutive patients (24 girls, 18 infants) with a median age of 2.3 years (range 44 days to 15.6 years) and median weight 11.5 kg (range 2.1–59 kg) underwent radical choledochal cyst excision with a wide hilar hepticojejunostomy. Thirty-eight were followed-up both clinically and by ultrasound scan and biochemical liver function tests for a median of 2.7 years (range 0.1–12.5 years). The median width of the hilar hepaticojejunostomy was 8 mm (range 6–25 mm) in 18 infants, and 15 mm (range 10–25 mm) in 22 older children. In one patient it was not measured. Only one surgical complication occurred—a self-limiting bile leak which settled spontaneously. Median postoperative stay was 6 days (range 5–21 days). No patient has had an episode of cholangitis or adhesive small bowel obstruction to date. Postoperative biochemical liver function tests have remained normal in all but one child (with pre-existing biliary cirrhosis). After radical resection of a choledochal cyst, a wide hilar hepaticojejunostomy is a, safe, effective and durable reconstructive technique that can be performed at any age and may help to minimize the long-term risk of complications.