A significant difference in DDB2 protein expression was found between normal tissues and PDAC stages 2, 3 and 4 (p= 1.24e-8, p= 1.07e-3 and p= 5.51e-3 respectively) as well as tumor grades 1, 2 and 3 (p= 3.39e-2, p= 5.56e-11 and p= 6.27e-3 respectively) (Figures 1B, C). This evidence concerns the gene DDB2 and neoplasm.