Large heterogenous cystic mass left frontal lobe along falx region. it extends along midline towards right side. mass shows heterogenous peripheral ring enhancement with central necrosis. Marked peritumoral edema extending along midline and corpus callosum. Adjacent mass effect with compression on anterior horn of both ventricles LT > RT side. 
Rest of brain parenchyma appear normal with no other enhancing lesion.   
Findings consistent with large Glioblastoma Multiforme / butterfly Glioma  
 