The Kaplan–Meier survival analysis shown in Fig. 2a revealed that elevated SGO2 mRNA expression related to an unfavorable survival in patients with high‐grade glioma (n = 77, p = 0.0011, by log‐rank test; 95% confidence interval:1.000–1.001, hazard ratio 1.001). The gene discussed is SGO2; the disease is central nervous system cancer.