Cancer of the pancreas is a disease in which malignant cells are found in the tissues of the pancreas. Hepatobiliary cancers refer to liver cancer and cancers of the biliary tract that occur in the bile ducts, the tubes that carry bile from the liver or gallbladder to the small intestine. Biliary tract cancers, also called cholangiocarcinomas, refer to those malignancies occurring in the organs of the biliary system, including pancreatic cancer, gallbladder cancer, and cancer of bile ducts.