Endoscopy, upper
A common type of endoscopy is upper endoscopy, also called esophagogastroduodenoscopy (EGD). In this procedure, a thin flexible instrument is advanced through the mouth to evaluate or treat problems of the esophagus, stomach, and beginning part of the small intestine. Endoscopy itself is a broad term used to described examining the inside of the body using an lighted, flexible instrument called an endoscope. In general, an endoscope is introduced into the body through a natural opening such as the mouth in the case of upper endoscopy.

Medical dictionary. 2011.

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