A colonoscopy is a screening test for colon cancer which uses a colonoscope connected a video camera and video display monitor to allow the physician to examine the lining of the entire colon.

Colonoscopy is an outpatient procedure that generally takes a minimum amount of time, although it may take longer if polyp removal is involved.

Procedure to diagnose and treat problems in the esophagus (food pipe, stomach and duodenum, the first part of the small intestine).

A contrast medium is introduced through an endoscope in radiology to visualize the common bile duct, the pancreatic duct and the hepatic ducts. This is often done to detect biliary obstruction from stones, tumors, strictures or injury to the bile duct. Gallstones are sometimes retrieved via an ERCP, tissues can be biopsied and biliary or pancreatic stents placed.

EUS combines elements of endoscopy with ultrasonic capabilities. While the endoscope provides access to the interior of the GI tract, the ultrasound component creates images of masses hidden within or on the other side of the GI tract wall.