gastroesophageal vestibule
gas·tro·e·soph·a·ge·al ves·ti·bule
the dilated aboral portion of the esophagus, just above the cardiac orifice; usually, it corresponds to the lumen of abdominal part of the esophagus although its relation to the diaphragm varies.
Synonym(s): esophagogastric vestibule
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