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Abstract
Despite treatment with radiation and temozolomide chemotherapy, malignant gliomas inevitably recur after treatment and have poor prognosis. Clinical trials should be offered when available, but effective treatment options for multiply recurrent tumors is sparse. In our multi-institutional retrospective cohort, we looked at recurrent malignant gliomas treated with Lenvatinib multi-kinase inhibitor. Patients consented to an IRB-approved study protocol that allows for longitudinal history review and analysis at our institution. Lenvatinib is a targeted therapy that is FDA approved for Differentiated Thyroid Cancer, Renal Cell Carcinoma, Hepatocellular Carcinoma, and Endometrial Carcinoma. Lenvatinib binds to tyrosine kinase receptors inhibiting kinase activity by VEGFR1-3, FGFR1-4, PDGFRa, FGF, KIT, and RET. In this cohort, patients received radiation and temozolomide chemotherapy, N=15, median age was 45.5, and 47% were male. At time of surgery 40% underwent biopsy, 40% had STR, and 20% had GTR. Glioblastoma was the most common tumor type at 87%, 6.7% were recurrent anaplastic astrocytoma, and 6.7% were recurrent glioma NOS. IDH mutation was seen in 13% of our cohort, and MGMT methylation was seen in 27%, all patients had available IDH and MGMT data. Patients were heavily treated, median number of recurrences was 3. Patient mean PFS was 2.7 months, and median OS was 24.0 months. Clincal Benefit Rate (PR+SD) to Lenvatinib in recurrent disease was 57%, with 29% Partial Responses and 29% Stable Disease as best radiographic response. This retrospective cohort supports further evaluation of the efficacy of Lenvatinib in recurrent malignant glioma in a clinical trial.