Pancreatic space-occupying lesions refer to the presence of abnormal tissue on the pancreas that is not part of the pancreatic tissue. It mainly includes benign space-occupying lesions and malignant space-occupying lesions. 1. Benign space-occupying lesions: Benign space-occupying lesions commonly include pseudocysts after pancreatitis, pancreatic plasma cysts, mucinous cystadenomas, etc. Some of them are caused by chronic pancreatitis. There are also some inflammatory masses caused by repeated episodes of chronic pancreatitis or pancreatic tuberculosis caused by tuberculosis infection. In addition, there may be other organs, commonly ectopic splenic tissue in the pancreas. 2. Malignant space-occupying lesion: it mainly refers to malignant tumor of pancreas, which most often appears in the head of pancreas, and a small portion of it appears in the body of pancreas and the tail of pancreas, and the common types include ductal adenocarcinoma of pancreas, etc. The rare types mainly include ductal adenocarcinoma of pancreas. Common types include ductal adenocarcinoma of the pancreas, and rare types include neuroendocrine tumor of the pancreas, pseudopapillary tumor of the pancreas, adenosquamous carcinoma of the pancreas, and junctional tumor. Pancreatic space-occupying lesions may also have other causes, and it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.