ARG1 and neoplasm: Thus, the levels of Arg-1 correlated with RFS (Supplementary Table S1) and Kaplan–Meier plots for the RFS of patients with low vs. high Arg-1 expression in tumor cells are shown in Figure 2C. Patients with tumors expressing high Arg-1 protein levels had significantly longer RFS than patients with low levels of Arg-1 expression in tumor cells (p = 0.0086).