LAG3 and neoplasm: Quantitatively, the tumor‐to‐muscle (T/M) and tumor‐to‐blood (T/B) ratios in LAG‐3+ A549 mice were statistically higher than those in LAG‐3− A549 mice (T/M: 10.2 ± 2.2 vs 3.8 ± 0.9, p < 0.01; T/B: 0.9 ± 0.3 vs 0.3 ± 0.02, p < 0.01) and blocked LAG‐3+ A549 mice (T/M: 10.2 ± 2.2 vs 3.0 ± 0.4, p < 0.01; T/B: 0.9 ± 0.3 vs 0.4 ± 0.1, p < 0.05) (Figure 3c).