In 11q23.3, which is a locus associated with IDH1-mutated glioma, the hypothesized target gene had been PHLDB1. However, our finding showed that the gene is BCL9L, which is a transcription regulator associated with WNT signaling in glioma (Lee et al., 2016; Gay et al., 2019). The gene discussed is IDH1; the disease is central nervous system cancer.