An endoscopic retrograde cholangiopancreatogram (ERCP) is a test that combines the use of a flexible, lighted scope with X-ray pictures to examine the tubes that drain the liver, gallbladder, and pancreas. The endoscope is intserted through the mouth and guided down the throat into the esophagus, stomach and duodenum until it reaches the point where the ducts from the pancreas (pancreatic ducts) and gallbladder (bile ducts) drain into the duodenum. ERCP is done to check for persistent abdominal pain or jaundice, find gallstones or diseases of the liver, bile ducts or pancreas, remove gallstones from the bile duct if they are causing a problem, open a narrowed bile duct, or to insert a stent. This procedure is performed outpatient at The Endoscopy Center at Southwest General Health Center.