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).