Assertion: cervical esophagus | /r/HasProperty | assessed by barium esophagography
Facets:
Source sentences:
text: As assessed by barium esophagography, the cervical esophagus is flattened owing to compression by surrounding structures; the thoracic portion is more rounded because of the negative-pressure environment of the thorax; and the abdominal portion is again flattened owing to positive intra-abdominal pressure.