Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Persistent right base opacity representing right lower lobe mass with postobstructive right lower lobe collapse , is again seen , with possible slight decrease in adjacent right base . The cardiac silhouette is enlarged . The mediastinal silhouette and hilar contours are stable . Small right pleural effusion would be difficult to exclude , no large pleural effusion . No evidence of pneumothorax sene .
    OUTPUT:
    
Right lower lobe mass with right lower lobe collapse , better seen on the recent CT torso .