在消化系统的恶性肿瘤中有五种是常见的,即胃癌、食管癌、肝癌、结肠癌及胰腺癌。胰腺癌虽排行在后,其发病率却有逐年增高的趋势。80％以上的患者是在40岁后发病,发病原因与其他肿瘤一样,并不十分清楚。 胰腺位于人体腹部的左上方,与胃、十二指肠、肝、胆管相邻(图)。其外形与胡萝卜相似。人们习惯 Five of the malignant tumors in the digestive system are common: stomach cancer, esophageal cancer, liver cancer, colon cancer, and pancreatic cancer. Although pancreatic cancer ranks behind, its incidence rate has increased year by year. More than 80% of patients develop after the age of 40. The cause of the disease is the same as other tumors. It is not very clear. The pancreas is located at the upper left of the human abdomen and is adjacent to the stomach, duodenum, liver, and bile duct (Figure). Its shape is similar to carrots. People are used to