ERCP (Endoscopic retrograde cholangiopancreatography) is a minimally invasive diagnostic and treatment procedure for pancreatic and biliary tract diseases involves passing an endoscope ERCP is an acronym for Endoscopic Retrograde Cholangiopancreatography. It is a procedure in which Endoscopy and X-rays are combined to allow your doctor to perform certain interventions. This allows your doctor to pass small sized tubes into your bile ducts and pancreatic ducts. Endoscopic retrograde cholangiopancreatography ( ERCP ) is a procedure to examine and diagnose diseases of the liver, bile ducts, and pancreas. What is ERCP ? ( Endoscopic Retrograde Cholangio-Pancreatography ) ERCP is a procedure that allows your doctor to see the small tubes inside your body called the pancreatic and bile ducts. These tubes are near your stomach. They carry digestive juices from your liver and pancreas to the intestines. For ERCP , your doctor uses a flexible lighted tube called an “endoscope.” The endoscope, or scope, is about as thick as your index finger. It goes through your mouth into your stomach and the ...