Choledochocele: a rare form of choledochal cyst.

Choledochocele is the least common form of cystic dilatation of the biliary tree. Whether this condition is a congenital abnormality or the result of inflammation at the papilla of Vater is not clear. In most cases, the clinical presentation is that of intermittent abdominal pain, nausea, and vomiting, with biliary colic and/or jaundice. As described in our case, choledochocele has characteristic radiologic features, but the lesion can be easily overlooked if one is not aware of its distinctive appearance.