Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A large left upper lobe lung mass is similar to prior . Overall aeration of the left lung is unchanged compared to most recent prior . There is persistent consolidation and effusion involving the left lung base . No pneumothorax is evident . Aeration of the right lung base is improved . The cardiac silhouette remains moderately enlarged , though unchanged . There is no overt interstitial edema .
    OUTPUT:
    
1 . Unchanged overall aeration of the left lung . 2 . Similar appearance of left upper lobe mass . 3 . Unchanged moderate cardiomegaly .