Endoscopic  retrograde cholangiopancreatography, or ERCP, is a procedure that uses an endoscope and X-rays to diagnose and treat problems in the liver, gallbladder, bile ducts, and pancreas.

⇒An endoscope is passed through the mouth, oesophagus and stomach, and into the first part of the small intestine called the duodenum.

⇒A small tube is inserted through the endoscope and guided into the opening of the bile and pancreatic ducts.

⇒A contrast dye is injected into the ducts to make them visible on X-rays.

⇒The doctor uses X-ray (fluoroscopy) to view the structures and identify any issues.