Long-term Survival in a Patient with Butterfly Glioblastoma: A Case Report.

Butterfly glioblastoma (bGBM) is a malignant glioma that crosses the corpus callous with bilateral cerebral hemisphere involvement. Literature reports are scarce and highlight a dismal prognosis with limited successful treatment options. We describe a patient who survived more than five years from the initial diagnosis. A 44-year-old woman presented to the emergency room for evaluation one day after a motor vehicle collision at the insistence of her husband, with four weeks of confusion, behavioral changes, and increased fatigue. Magnetic resonance imaging (MRI) of the brain revealed an enhancing, heterogeneous mass with significant necrosis, centered in the septum pellucidum and corpus callosum with intraventricular extension. She underwent a stereotactic biopsy of the lesion. Pathology was consistent with glioblastoma, WHO grade IV. She underwent standard radiation treatment and adjuvant temozolomide, demonstrating a near-complete disappearance of the tumor on imaging for the subsequent two years. Upon recurrence, she underwent additional chemotherapy with limited response. A repeat biopsy was positive for a BRAF mutation and she was treated with lomustine. After two cycles, she developed thrombocytopenia and shortly after elected to discontinue treatment. She succumbed to the progression of disease five years and two months after the initial presentation. bGBMs are uncommon and highly aggressive brain tumors. A tailored treatment protocol may improve survival. This case marks an unusually long survival of a patient with bGBM and may prompt further research to better understand the behavior of these tumors and how to improve treatment response and survival.