In this study, the investigator try to select 80 patients who received radical surgery for pancreatic cancer, whose circulating tumor cells(CTCs) count then performed on intraoperative portal venous blood to predict postoperative liver metastasis and were divided into two groups. for those who have high CTCs count may have more chance for the occurrence of postoperative liver metastasis was applied hepatic arterial perfusion chemotherapy with minimal dynamic randomization. The aim is to evaluate the feasibility of hepatic arterial infusion chemotherapy for the prevention of postoperative liver metastasis and improvement of prognosis of pancreatic cancer, so as to further improve postoperative management of pancreatic cancer
