Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior film , the degree of opacification in left mid and lower zones has progressed , with new obscuration left hemidiaphragm . The appearance is suggestive of a left pleural effusion , probably loculated , with underlying collapse and / or consolidation . Allowing for obscuration of the left heart border , prominence of the cardiomediastinal silhouette appears stable and the mediastinum remains midline . Possible minimal prominence of the right pulmonary artery is unchanged . There is mild upper zone redistribution , without other evidence of CHF . The right lung is grossly clear , except were minimal atelectasis or scarring at the right lung base . No gross right effusion .
    OUTPUT:
    
Worsening opacification of the left mid and lower zones , likely a combination of pleural fluid can collapse and / or consolidation .