A heterogenous peripherally enhancing mass left posterior parietal lobe along left side of falx margin.  mass shows  peripheral ring enhancement with central cystic necrosis. disproportionate  peritumoral edema with  mild mass effect. No midline shift or ventricular compression.  
Rest of brain parenchyma appear normal. 
Differentials include Cystic Astrocytoma /  or cystic metastasis / or abscess formation.
 
 