Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparisons to the prior study , there is interval development of large dense left mid and lower lung opacification consistent with a large pleural effusion and likely increased size of known left juxta hilar mass . This is associated with contralateral shift of the heart and mediastinum . Small right pleural effusion and right basilar atelectasis have increased . No pneumothorax .
    OUTPUT:
    
Interval development of large left pleural effusion and increased size of left juxta hilar mass resulting in shift of the heart and mediastinum to the right . Increased small right effusion and right basilar atelectasis .