Large irregular peripherally enhancing mass left frontal lobe.  mass shows irregular heterogenous enhancement thick wall enhancement with central necrotic component.  marked peritumoral edema and mass effect. compression on anterior horn of left lateral ventricle and mild contralateral midline shift towards right side. 
Findings consistent with aggressive mass/ astrocytoma left frontal lobe likely Glioblastoma multiforme (GBM).  