Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left pleural effusion has increased significantly . Underlying consolidation due to atelectasis or possible pneumonia can not be ruled out . Multiple left lung masses best seen on previous chest radiograph and CT are faintly visible , partially obscured by the pleural effusion , unchanged . The right hilar mass is unchanged . The right lung is otherwise clear . No pneumothorax . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
1 . Interval reaccumulation of left pleural effusion . Underlying atelectasis and / or pneumonia can not be ruled out . 2 . Unchanged right hilar mass . Multiple previously seen left lung masses are only faintly visible , obscured by the pleural effusion .