Fig. 2. Cumulative recurrence rates after surgical resection according to the degree of Ki-67 (A) and p53 expression (B) in pancreatic head cancer tissue. Overall recurrence-free survival rates were not different between patients with Ki-67 and p53 expression (P = 0.055 and P = 0.053, respectively). However, the recurrence-rate within 1 year after surgical resection was significantly lower in pancreatic head cancer patients expressing Ki-67 (P = 0.003) and p53 (42.8% vs. 84.6%, P = 0.030).