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