endoscopic retrograde cholangiopancreatography. ercp, bile duct diagnosis.

endoscopic choledocholithiasis cholecystitis cholangiopancreatography pancreatitis cholangitis cholecystectomy gallstones inflammation treatment procedure surgical diagnosis sphincterotomy liver medical catheter pancreas duodenoscope blockage evaluate symptoms scan disease infection surgery test endoscopy drainage strictures equipment duodenum abdominal operative obstruction bile ducts intestines gastroenterologist gallbladder pain stenosis biliary percutaneous retrograde ercp duct removing