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Esophageal sphincter

   Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.01 sec.
Esophageal sphincter
A circular band of muscle that closes the last few centimeters of the esophagus and prevents the backward flow of stomach contents.
Mentioned in: Achalasia
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Findings on transnasal esophagoscopy were normal except for the presence of a widely patulous lower esophageal sphincter (LES) (figure).
Patulous lower esophageal sphincter by Rees, Catherine J.; Belafsky, Peter C. / Ear, Nose and Throat Journal
Pneumomediastinum coexistent with achalasia is usually due to esophageal perforation from pneumatic dilation of the lower esophageal sphincter, (8) or rarely with botulinum toxin injection of the distal esophagus.
Spontaneous pneumomediastinum due to achalasia: a case report by Jordan, Paul A. / Southern Medical Journal
GERD occurs when the esophageal sphincter, the ring of muscle at the top of the stomach, allows acid to creep up the esophagus.
Ill informed: how drug companies convince Americans they're sicker ... by Brownlee, Shannon / Washington Monthly
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