Brain Stem Lesions Brain Tumor Surgery 14/02/2019 Brain Tumor Surgery 14/02/2019 Brain Tumor Surgery 14/02/2019 Brain Tumor Surgery 14/02/2019 Brain Tumor 10 hr Surgery cricket ball size tumor removed cricket ball size tumor removed cricket ball size tumor removed cricket ball size tumor removed cricket ball size tumor removed frontal lobe tumor intraop frontal epidermoid pre t2w frontal epidermoid pre diffusion frontal epidermoid post Brainstem Glioma