Pancreatic cancer can be misdiagnosed, or the pancreatic cancer may be undiagnosed leading to misdiagnosis, or the patient may have other diseases of the pancreas that are misdiagnosed as pancreatic cancer. For example, it may be chronic pancreatitis, or autoimmune pancreatitis or sulcular pancreatitis, which may be misdiagnosed as pancreatic cancer. The typical presentation of pancreatic cancer is that the patient has pain in the abdomen and a mass in the pancreas. Enhanced CT examination of the pancreas is usually required and most pancreatic tumors can be diagnosed. In the arterial phase, the density of normal pancreatic tissue increases significantly, but in the pancreatic tumor, due to the lack of blood supply, the increase in density is not particularly obvious, so the typical CT presentation is able to diagnose pancreatic cancer. However, sometimes patients with atypical CT presentation can easily miss or misdiagnose pancreatic cancer, and some patients with chronic pancreatitis or autoimmune pancreatitis may be misdiagnosed as pancreatic cancer, which requires vigilance.