Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are unchanged . Cardiac size is top - normal . Patient has known aortic aneurysm and enlargement of the pulmonary arteries . The mediastinum is widened . Biapical pleural - parenchymal scarring is unchanged . Left lower lobe necrotic mass is better seen in prior CT . . Small left pleural effusion is unchanged . There is no evident pneumothorax . The osseous structures are unremarkable
    OUTPUT:
    
Stable appearance of the chest . No new lung consolidations . Left lower necrotic mass was better evaluated on prior CT .