What is an upper endoscopy?

An upper endoscopy or EGD is a procedure that involves inserting a thin scope with a tiny camera on the end to examine the upper digestive tract, including the esophagus, stomach and duodenum (beginning of small intestine). This test may be used to investigate digestive symptoms, such as nausea, vomiting, abdominal pain and swallowing issues. It can be used to collect tissue samples to test for a variety of diseases and conditions of the digestive system.