CD8A and neoplasm: Among CD8+ T cells, M1 (CD68+HLA-DR+) tumor-associated macrophages (TAMs), M2 TAMs (CD68+HLA-DR-), CD56bright NK cells and CD56dim NK cells, less CD8+ T cell infiltration was found in the EGFR mutation group than in the group without EGFR mutation (p<0.05).