Finally, we observed that FOXP3 expression correlated with infiltration of CD8 + T cells (R = 0.276, P = 5.90E−10), CD4 + T cells (R = 0.643, P = 6.81E−58), neutrophils (R = 0.525, P = 1.57E−35), and dendritic cells (R = 0.608, P = 1.35E−50) in lung adenocarcinoma, the same results were observed in lung squamous cell carcinoma. This evidence concerns the gene CD8A and squamous cell lung carcinoma.