An enteroscopy is an endoscopic procedure where a long, thin, flexible camera is placed into the mouth and advanced to the jejunum (the second portion of the small intestine). The scope has a light and a camera on the end of it which allows the physician to examine the lining of the esophagus, stomach, and small intestine. An enteroscopy may be performed to diagnose the cause of gastrointestinal symptoms such as abdominal pain, bleeding, or abnormal x-ray results.