Upper endoscopy is a test that looks inside the upper gastrointestinal, or GI tract. The GI tract includes the esophagus, stomach, and the duodenum, which is the first part of the small intestine.
Upper endoscopy is a test that looks inside the upper gastrointestinal, or GI tract. The GI tract includes the esophagus, stomach, and the duodenum, which is the first part of the small intestine.
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