To assess the effect of CA11 expression on clinical prognosis, we used the Kaplan–Meier survival curve to analyze the effects of CA11 expression on the survival of patients in four independent datasets from open‐access databases: REMBRANDT gliomas dataset (n = 524, Fig. 5A), TCGA LGG dataset (n = 532, Fig. 5B), GSE4271 dataset (n = 77, Fig. 5C) (Phillips et al., 2006), and GSE42669 (n = 58, Fig. 5D) (Joo et al., 2013). The gene discussed is CA11; the disease is central nervous system cancer.