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Medical Term:

inferior esophageal sphincter


Definition: a physiologic sphincter at the level of the esophagogastric junction; this is in fact an extrinsic sphincter formed by the surrounding musculature of the esophageal hiatus of the right crus of the diaphragm; causes a normally occurring constriction at the esophagogastric junction observable with a barium swallow.

Synonym(s): sphincter constrictor cardiae

© Copyright 2016 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.