Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: 2 views of the chest : The right lung is well expanded and clear . The left lung shows persistent and worsening of left lower lobe opacification . The mediastinal silhouette is severely widening , unchanged . The hilar contours are normal . No pneumothorax is present .
    OUTPUT:
    
Persistent left pleural effusion with associated atelectasis .