FOXP3 and neoplasm: Positive PD-1 and FOXP3 expressions were shown to be substantially associated with tumor grades (P = 0.036) and (P = 0.009) respectively, but not with age (P = 0.308, for PD-1 and 0.368, for FOXP3), gender (P = 0.12, for PD-1 and 0.171, for FOXP3), tumor location (PD-1 = P: 0.465 and FOXP3 = P: 0.848) or histological lineage.