Treatment with the combination of DC vaccination plus lenalidomide and PD-1 blockade more strongly inhibited tumor growth (P < 0.05) compared to DCs, DCs + lenalidomide, DCs + PD-1 blockade, and lenalidomide + PD-1 blockade (Figure 1B; Figures S2A and S3A,B in Supplementary Material). This evidence concerns the gene PDCD1 and neoplasm.