Related diseases of liver, gallbladder, bile ducts and pancreas should not be overlooked. For instance, liver cancer and pancreatic cancer are two common cancers in Hong Kong, and patients often seek medical consultation and examination only when they are in pain because the early symptoms of the cancer are not obvious. Early detection of pancreatic cancer is extremely important as it is riskier and more difficult to perform surgery for advanced cancer, and early diagnosis is essential to enhance the effectiveness of treatment.