Pancreatic cancer is difficult to diagnose because its early symptoms are common, and the clinical manifestations of other diseases have similar symptoms, then pancreatic cancer is easily affected by the symptoms of those diseases and misdiagnosed? The diagnosis of pancreatic cancer is easily confused with the following diseases: 1, various chronic gastric diseases: stomach disorders can have abdominal pain, but abdominal pain is mostly related to diet, jaundice is rare, and it is not difficult to make a differentiation by using X-ray barium meal and fiberoptic gastroscopy. 2, jaundice hepatitis: at first, the two are easy to be mixed up, and the symptoms are similar to those of other diseases. 2.Jaundice hepatitis: the two are easy to be confused at the beginning, but there is a history of contact with hepatitis, after dynamic observation, serum aminotransferase increases when jaundice starts, jaundice more than 2 to 3 weeks after the gradual subsidence of jaundice, serum alkaline phosphatase is not high. Cholelithiasis and cholecystitis: abdominal pain is paroxysmal colic, fever and leukocyte increase are often found in acute attack, jaundice subsides or fluctuates in a short period of time, without obvious weight loss. 4.Primary hepatocellular carcinoma: there is often a history of hepatitis or cirrhosis, positive serum alpha-fetoprotein, hepatomegaly first, jaundice appears in the late stage, abdominal pain doesn’t change according to the change of body position, ultrasound and radionuclide scanning can find hepatic space-occupying lesions.