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9.3 US views of esophagus. (A) Sagittal view of the fetal neck, thorax, and upper abdomen, showing the course of an empty esophagus (small arrows), behind the trachea (big arrow). H: heart; *: pharynx. (B) The parasagittal view of the thorax demonstrates a distended esophagus behind the left atrium (arrowheads). LV: left ventricle; RV: right ventricle; Pa: pulmonary artery. (C) Axial view of the thorax: behind the left atrium (LA), a distended esophagus (arrow) can be seen ………………………………