目前,胰腺癌的治疗效果令人失望,约半数病例在确诊时已有远处转移而不能手术,不少局部进展期肿瘤因侵犯周围血管而不能行根治性切除。由于肿瘤复发和转移等原因,胰腺癌5年生存率仍低于5 % ,中位生存时间低于2 0个月,其中局部进展期低于10个月,伴有远处转移者仅为6个月[1] 。我 At present, the therapeutic effect of pancreatic cancer is disappointing. About half of cases have distant metastasis at the time of diagnosis and can not be surgically treated. Many locally advanced tumors can not undergo radical resection due to violations of peripheral blood vessels. Due to tumor recurrence and metastasis, the 5-year survival rate of pancreatic cancer is still below 5%, the median survival time is less than 20 months, of which the local progression is less than 10 months, with distant metastasis only 6 Months [1]. I