Endoscopy is a nonsurgical procedure used to

examine a person's digestive tract. Using an 

endoscope, a flexible tube with a light and

camera attached to it, your doctor can view

pictures of your digestive tract on a color TV

monitor.

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 Upper endoscopy, also known as EGD, is a procedure in which a thin scope with a light and camera at its tip i used to look inside the upper digestive tract -- the esophagus, stomach, and first part of the small intestine, called the duodenum.

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Colonoscopy is a test that allows your doctor to look at the inner lining of your large intestine (rectum and colon). He or she uses a thin, flexible tube called a colonoscope to look at the colon. A colonoscopy helps find ulcers, colon polyps, tumors, and areas of inflammation or bleeding.