胰腺癌发病率在全世界范围内呈上升趋势。据美国肿瘤学会(ACS)统计,2000年新发病28 300例,死亡28 000例,居恶性肿瘤死亡率的第4位。因其解剖学的特点,临床上很难早期发现,在诊断时,80％的胰腺癌丧失了手术机会。胰腺癌的治疗和预后很大程度上取决于肿瘤浸润的程度、淋巴结和远处转移的出现,尤其是血管累及的出现。由于胰腺 The incidence of pancreatic cancer in the world is on the rise. According to the American Society of Oncology (ACS), 28 300 new cases of disease and 28 000 deaths were recorded in 2000, ranking the fourth in the mortality rate of malignant tumors. Because of its anatomical characteristics, it is difficult to find clinically early, at the time of diagnosis, 80% of pancreatic cancer lost the chance of surgery. The treatment and prognosis of pancreatic cancer depends largely on the extent of tumor invasion, the presence of lymph nodes and distant metastases, especially the presence of blood vessels. Because of the pancreas