In turn, high expression of CXCR4 in BRCA corresponds to better prognosis, smaller yet significant difference between Kaplan-Meier curves predicting better prognosis was observed for lung adenocarcinoma (LUAD) and thyroid cancer (THCA) (Figure 3B, Table 2), whereas no difference was observed in lung squamous cell carcinoma (LUSC). This evidence concerns the gene CXCR4 and thyroid cancer.