thoracic constriction of esophagus
Definition: normal left-sided narrowing of the esophagus, demonstrated radiographically after a barium swallow, at the T4–T5 vertebral level, where the esophagus is impressed by the left main bronchus and the arch of the aorta.
Synonym(s): constrictio partis thoracicae esophageaTA, broncho-aortic constriction, constrictio bronchoaortica esophagea, middle esophageal constriction
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