Medical Definition of Endoscopy, upper

Endoscopy, upper: A procedure that enables the examiner (usually a gastroenterologist) to examine the esophagus, the stomach, and the first portion of small bowel (duodenum) by using a thin, flexible tube that can be looked through or seen through on a TV monitor. Also known as esophagogastroduodenoscopy (EGD).

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Last Editorial Review: 6/9/2016

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