Endoscopy is an incredibly valuable diagnostic procedure used to examine a hollow organ or cavity of the body. An endoscope is a thin, flexible tube with a light and attached camera that can be inserted into the body. This allows for live visualization of body parts like the esophagus, stomach, colon, bladder, nose or airways. Biopsies are often taken at the time of an endoscopic procedures through the use of other specialized instruments. An endoscopic procedure can also be used to retrieve foreign objects from the stomach, airways or nose.