To determine which ADAR(s) is/are functionally relevant to GBM, we correlated the mRNA levels of individual ADAR genes with levels in normal brain and survival in GBM using 3 large patient databases: TCGA, the Chinese Glioma Genome Atlas (CGGA), and the Repository of Molecular Brain Neoplasia Data (REMBRANDT). This evidence concerns the gene ADAR and glioma.