[Vestigial cysts of the anterior intestine of unusual localization. Report of two cases].

Bronchogenic cysts and enteric cysts both result from an aberration of development of the anterior gut. Their usual location is the mediastinum. The abdominal or retroperitoneal location of such cysts is rare and raises problems in terminology and pathogenesis. We report two cases of an unusual location of bronchogenic and enteric cysts. We also recall the criteria of diagnosis and the pathogenesis.