IHC review of the biopsy samples from the left lung and pelvic tumor at the time of diagnosis showed that there were few TILs including CD8+ T cells (NCL‐L‐CD8‐4B11, Leica Microsystems), CD4+ T cells (NCL‐L‐CD4‐1F6, Leica Microsystems), and PD‐1+ cells (NAT105, Abcam) in both biopsy samples obtained from the primary lung cancer site and metastatic site of the left pelvis (Figure 4(a)–(h)). This evidence concerns the gene CD4 and lung carcinoma.