These results were confirmed when analyzing the expression levels of 1,926 lung cancer patients by using the Kaplan–Meier plotter online tool and the TCGA data sets, revealing that those patients with lower expression of HOXD9 had a significantly better overall survival rate that was independently associated with the tumor histology (p < 0.001) (Figure 6F–H). The gene discussed is HOXD9; the disease is lung cancer.