USP9X and cancer: Dysregulation of DUBs is intricately associated with tumorigenesis by modulating the stability of various tumor suppressors and oncogenes.[16, 17, 18] Emerging evidence suggests that ubiquitin specific peptidase 9, X‐linked (USP9X), a crucial member of the USP family, plays an oncogenic role in GBM.[19, 20] However, it is not clear whether USP9X controls cancer metabolism of GBM cells.