SOX9 and central nervous system cancer: Previous studies have shown that knockdown of SOX9 in human lung carcinoma cells induces apoptosis via decreased p‐Wnt and β‐catenin expression (Guo et al., 2018)and that β‐catenin is a pivotal target for glioma and ovarian cancer therapy (Arend et al., 2013; He et al., 2019).