In agreement, our quantitative analysis using qPCR (n = 38) and RNA-seq methods (n = 7) did not detect significant expression of CCDC26 in the majority (90%) of glioma tumor samples, which indicated that rs55705857 is unlikely to exert its effect by modulating the expression of major isoforms of CCDC26 in tumor cells. This evidence concerns the gene CCDC26 and central nervous system cancer.