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Guide. An upper gastrointestinal (UGI) endoscopy is a procedure that allows your doctor to look at the inside lining of your esophagus, your stomach, and the first part of your small intestine (duodenum).
An upper GI Endoscopy, sometimes called EGD (esophagogastroduodenoscopy), is a visual examination of the upper intestinal tract (esophagus, stomach, and intestines just below the stomach) using a lighted flexible fiberoptic or video endoscope which is a long, thin, flexible tube with a tiny video camera and light on the end.