Progressive adult primary glioblastoma in the medulla oblongata with an unmethylated MGMT promoter and without an IDH mutation. 
A 63-year-old woman presented with dizziness followed by gait disturbance and loss of appetite.  Magnetic resonance image (MRI) showed that a lesion located in the medulla oblongata, appearing as hyperintense on T2-weighted image and with slight enhancement area, appeared in the ventral aspect of the mass on T1-weighted MR imaging with gadolinium.  It was diagnosed as high-grade brain-stem glioma and the patient underwent chemoradiotherapy.  However, she died 18 days after treatment, and autopsy was performed.  The pathological diagnosis was glioblastoma (GBM) with unmethylated O-6-methylguanine-DNA methyltransferase promoter and wild isocitrate dehydrogenase 1 gene.  We report an extremely short clinical course of adult GBM in medulla oblongata with genetic analysis and present a review of the literature.