An upper endoscopy is a procedure used to visually examine your upper digestive system with a small camera at the end of a long, flexible tube. A specialist in diseases of the digestive system (gastroenterologist) uses endoscopy to diagnose and sometimes treat conditions that affect the esophagus, stomach, and the beginning of the small intestine (duodenum).
The doctor can view images of your digestive tract on a color television monitor.
