HLA-G gene in lung cancer had a HR = 1.21 (95% CI, 1.07–1.38) and logrank p-value = 0.0029 and in gastric cancer HR = 1.3 (95% CI, 1.09–1.54) and logrank p-value = 0.0027; therefore the results were statistically significant (the relation between the low expression of HLA-G gene and more survival rate) (Fig. 6). This evidence concerns the gene HLA-G and lung cancer.