Endoscopy:

High gastrointestinal endoscopy is a test in which a small endoscopic tube is inserted through the mouth to the stomach, to look at organ walls such as the esophagus, stomach and bowel onset, because it is a test used to try to identify the cause of abdominal discomfort that has been present for a long […]

High gastrointestinal endoscopy is an exam in which a thin tube, called an endoscope, is inserted through your mouth into your stomach, allowing you to look at the walls of organs such as your esophagus, stomach, and the beginning of your intestine. Thus, it is a widely used test to try to identify a cause