The width of the common bile duct in childhood.

The maximum diameter of the common bile duct was measured on 85 normal intravenous cholangiograms carried out on children between the ages of 1--14 years. There was a close correlation between bile duct width and the patient's age, but a poor correlation with weight. The range of bile duct widths in each age group is tabulated as a guide to diagnosing biliary dilatation in childhood.