Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP view of the chest was compared to previous exam from earlier the same day and exam from ___ . Seen on exam from earlier the same day , but new since ___ is left basilar opacity which silhouettes the hemidiaphragm . This is suggestive of pleural effusion with underlying atelectasis or consolidation is possible . Elsewhere , the lungs are clear . Biapical scarring is again noted . Cardiac silhouette is enlarged but unchanged . No acute osseous abnormality is detected .
    OUTPUT:
    
Left pleural effusion with superimposed consolidation or atelectasis not excluded .