[Diagnostic contribution of ultrasonography in choledochal cysts (author's transl)].

With regard to observations of 6 children with choledochal cysts, the importance of the anatomic data obtained by ultrasonography is emphasized. In the most common types of cystic dilatation of the common bile duct, the precise details concerning the size and place of the extra-hepatic biliary abnormality make ultrasonography the best pre-operative investigation.