Examination and diagnosis methods: 1, X-ray examination (barium meal X-ray examination of the stomach and intestines, can find out whether the adjacent organs of the pancreas are deformed by pressure). 2.B ultrasound examination. 3.Fiber endoscopy. 4.CT or MRI examination. 5.Laboratory examination, including serum amylase, blood glucose, serum bilirubin, serum glutaminase, transpeptidase, hemoglobin. 6.Immunological examination, carcinoembryonic antigen assay (CEA), pancreatic carcinoembryonic antigen (POA) assay, CAl99 assay, etc. Powder enzyme test