Endoscopy literally means “looking inside.” It is a minimally invasive diagnostic medical procedure that allows us to evaluate, diagnose and, in some cases, treat problems. Using an endoscope (a long thin, flexible tube with a tiny video camera and light on the end) our highly-trained physicians perform colonoscopy. The most common of procedures, a colonoscopy is used to examine the lining of your large intestine (also known as the colon).