[Prenatal echographic study of esophageal duplication. A case report]

We report a case of abdomino-thoracic oesophageal duplication revealed by prenatal ultrasonography as a liquid mass in the posterior mediastinum, responsible for a major chylothorax. Tow our knowledge, this is the first thoroughly documented case occurring in the prenatal period. The various possible ultrasonographic diagnoses and the possibility of therapeutic drainage of pleural effusions are discussed in the light of anatomy, embryogenesis and ultrasonographic images of the lesion.