An upper endoscopy, often referred to as endoscopy, EGD, or esophago-gastro-duodenoscopy, is a procedure that allows a physician to directly examine the upper part of the gastrointestinal (GI ...

Understanding upper endoscopy: In an upper endoscopy, an endoscope is placed into the mouth of the patient to examine the upper gastrointestinal tract (covering the stomach and duodenum).