A large, heterogenous peripherally enhancing mass left  posterior parietal lobe, periventricular region  involving splenium of corpus callosum.   mass shows  peripheral thick wall enhancement with central cystic necrosis. moderate  peritumoral edema with  mass effect. Mass extending across midline,  compression on left occipital horn of ventricle.  
Rest of brain parenchyma appear normal. 
Differentials include Cystic Astrocytoma /  Glioblastoma Multiforme.
 
 