We found the IL7R gene copy number variation significantly affected the infiltration levels of B cells, CD4 + T cells, and DC cells (Figure 7C).IL7R was negatively correlated with the tumor purity of lung adenocarcinoma and positively correlated with the expression of B cells, CD8+T cells, CD4+T cells, macrophages, monocytes, and DC cells (Figure 7D). Here, CD4 is linked to lung adenocarcinoma.