More specifically, expression of SOD2 and CXCL8 was higher in GPM-GBM than in MTC-GBM (Figure 7C) and the analysis of the impact of upregulation of these two genes, according to the Kaplan–Meier estimator, showed that CXCL8 upregulation was more negative than SOD2 upregulation, as GPM-GBM cases with lower SOD2/CXCL8 ratio had an OS of 7.72 months compared to 22.26 months for cases with a higher ratio (p = 0.002, Logrank test) (Figure 7D). This evidence concerns the gene CXCL8 and medullary thyroid gland carcinoma.