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胰腺癌的发病率逐渐增加,近已成为美国病死原因中第四位癌肿。多数病例已不能手术根治,仅作胆道转流手术,但其中有7～34％病例因肿瘤阻塞十二
The incidence of pancreatic cancer has gradually increased and it has recently become the fourth leading cause of cancer in the United States. Most cases can not be radical surgery, only biliary bypass surgery, but 7 to 34% of them due to tumor obstruction