There are many diagnostic terms related to “pancreatic cancer” with different meanings: 1. Pancreatic lesion: refers to various diseases occurring in the pancreas, which is the most general concept. 2. Pancreatic mass: refers to various mass structures and lesions occurring in the pancreas. Due to the lack of understanding of the structures and lesions around the pancreas, many peri-pancreatic diseases are also included. 3. Pancreatic tumors: specifically tumorigenic lesions, including benign, junctional and malignant tumors in the pancreas and parapancreatic; due to differences in the level of understanding, it often happens clinically that parapancreatic or other tumors in the pancreas are misdiagnosed as pancreatic tumors. There are 18 types of malignant tumors of pancreatic tissue origin, and their biological behaviors (growth patterns) are very different, and their prognoses are also different; unfortunately, most of the Consensus at home and abroad classify all these tumors as “pancreatic cancer”. This has led to unnecessary over-medication. 5. Pancreatic adenocarcinoma: It is a malignant tumor originating from the ductal epithelium of the pancreas, and its biological behavior is closest to that of pancreatic cancer. 6. Pancreatic head cancer: also known as “malignant tumor of the pancreatic duodenal jugular area”, it refers to malignant tumors that occur in the head of the pancreas, duodenum, and jugular area, and its tissue sources include pancreatic tissue, distal bile duct, duodenal papilla, duodenum and its surrounding interstitium. . To sum up, the definition of pancreatic cancer in the scientific sense is congenitally deficient, and the most consistent with the scientific sense of pancreatic cancer is pancreatic ductal adenocarcinoma, the incidence of which is far from being as high as imagined (according to incomplete statistics, it only accounts for about 40% of pancreatic surgical procedures). Don’t scare yourself before you really know the diagnosis. It is important to clarify the above concept before treatment, and the best way is through “multidisciplinary discussion (MDT)”, and the simplest way is to consult with experienced pancreatic imaging specialists.