BMI1 and glioblastoma: Bmi‐1 has a critical role in modulating the tumor microenvironment to support the plasticity of GBM stem cells.We explore Bmi‐1's involvement in maintaining glioma stem cell (GSC) proliferation and senescence evasion upon regulating the chromatin structure of several tumor suppressor genes, cell cycle inhibitors, or stem cell genes in tumor cells.