the authors report two cases which show that type 1 cysts ( axial dilatation of the common bile duct and common hepatic duct ) may be caused by a biliary web and that some choledochoceles ( type 3 cyst ) may actually be duodenal duplications ( i.e. , having an outer wall of smooth muscle lined with gastrointestinal mucosa and being adherent to the gut ) .
C0008340
choledochoceles
C0010709
cyst