FGF4 and glioblastoma: Fibroblast growth factor 4 (FGF4) also has been correlated with a greater malignancy profile in high-grade gliomas [15].The radioresistant cells had upregulated expression of many anti-apoptotic genes, including BCL2, CD74, and WT1, which regulates GBM cells proliferation and apoptosis [16].