Endoscopic Retrograde Cholangiopancreatography(ERCP) The ductal systems of the gallbladder, liver, and pancreas are patent, with no evidence of obstruction from stone, stricture, or tumor A fiberoptic endoscope is passed through the mouth, esophagus, stomach, and into the duodenum. A small cannula is inserted into the ampulla of Vater and into the common duct and pancreatic duct To investigate the cause of obstructive jaundice and/or persistent abdominal pain associated with biliary or pancreatic disorder Biliary stone Sclerosing Cholangitis Fibrosis or stricture Cholangiocarcinoma Metastatic Cancer Chronic pancreatitis Cancer of the head of the pancreas Fistula Abscess Uncooperative behavior Severe, acute pancreatitis Acute biliary obstruction Acute Myocardial Infarction Esophageal or gastric outlet obstruction Hepatitis B infection