The main body of the pancreas is on the left side. The main body of the pancreas is located in the supra-abdominal area and the left quadrangular rib area, about 10 cm above the umbilicus and 5 cm below the umbilicus; the position is deeper, placed transversely in front of the 1st~2nd lumbar vertebrae, and adhered to the posterior abdominal wall, which is an extra-peritoneal organ. The pancreas is long and narrow, divided into four parts, head, neck, body and tail, with no obvious boundary between the parts; the anterior septal omental bursa is adjacent to the stomach, and there are important structures such as the inferior vena cava, the common bile duct, the hepatic portal vein and the abdominal aorta in the back, and the right end of the pancreas is up to the duodenum, and the left end is up to the splenic hilum. The head of the pancreas is the dilated part of the right end of the pancreas, located in the right anterior part of the 2nd lumbar vertebral body, which is surrounded by the duodenum on the upper, lower and right sides; the neck of the pancreas is a narrow, flat and thin part of the pancreas between the head of the pancreas and the body of the pancreas, which is neighboring to the pyloric hatch of the stomach in front of the upper part, and is followed by the mesenteric superior, and the beginning of hepatic portal vein. These two parts are basically to the right of the abdominal midline. The body of the pancreas is located between the neck and the tail of the pancreas, which makes up the majority of the pancreas; the tail of the pancreas is thinner and travels toward the splenic hilum in the left quartal region. These two parts are to the left of the abdominal midline. Pancreatic lesions are more serious, if you have abdominal symptoms, you should consult a doctor in time, so as not to miss the condition.