The study of liver and biliary disorders is undertaken within the field of hepatology. Liver diseases are caused by a variety of factors. Some of these are viral hepatitis and other infectious diseases, inflammatory liver conditions, conditions arising due to high alcohol consumption and toxins, malignant neoplasm of the liver and intrahepatic bile ducts, metabolic diseases and vascular disorders of the liver, etc. Diseases of the gallbladder and biliary tract include malignant neoplasms, cholecystitis, cholelithiasis, biliary dyskinesia, spasm of sphincter of Oddi, etc. The investigation of biliary and liver diseases is done through specialized imaging techniques. Non-invasive non-therapuetic investigations are possible with the aid of endoscopic ultrasound and magnetic resonance cholangiopancreatography. Endoscopic retrograde cholangiopancreatography combines fluoroscopy and endoscopy to diagnose and treat disorders of the biliary or pancreatic ductal systems. It can address inflamma