Astroblastoma MN1 altered Neuroradiographic and Neuropathologic Features
T2-weighted MRI reveals a large temporal parietal cystic tumor associated with surrounding vasogenic edema (A) and rim enhancement on post-gadolinium weighted sequences (B). Microscopic sections show a highly cellular spindle cell tumor with brisk mitotic activity (C). The tumor cells demonstrated absent immunohistochemical reactivity for GFAP (D) and positivity for Olig2, and (E) ATRX (F) (C-F: magnification x200).