Pancreatic cancer is the fourth leading cause of cancer-related death worldwide. The 5-year survival rate in overall patients is less than 6% due to late clinical manifestation and the systemic nature of the disease at presentation. Even in patients with resectable disease, estimated 5-year survival rates after resection are between 15% and 20%. Traditionally, resection alone is regarded as inadequate for cure. Therefore, systemic and/or combined chemotherapy and radiotherapy have been used as preoperative or postoperative therapy.