Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild atelectasis in the medial right lower lung . Layering pleural effusion on the left is redistributed but grossly unchanged in volume . The heart is obscured . Known cavitary lesion in the left lung apex is better appreciated on prior chest CT . No pneumothorax is detected .
    OUTPUT:
    
Redistribution of left pleural effusion without appreciable change in overall volume .