3% of GBM and IDHwt gliomas have a highly oncogenic FGFR-TACC gene fusion that confers high sensitivity to FGFR inhibitors to tumor cells, in vitro and in vivo. Preclinical data shows that expression of FGFR-TACC fusions confers sensitivity to FGFR inhibitors (including AZD4547) to GBM models.AZD4547 (AstraZeneca) is a potent and selective inhibitor of FGFR-1, 2 and 3 receptor tyrosine kinases. Preclinical data have shown some CNS penetration. Some of the important adverse events are hyperphosphatemia, and ocular complications. The primary objective and assessment criterion is to assess the efficacy of AZD4547 by measuring the rate of Progression Free Survival at 6 months (PFS6) in recurrent malignant glioma patients with FGFR-TACC fusion.Secondary objectives and assessment criteria are: - To characterize the safety, tolerability and PK of AZD4547 in glioma patients