Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison with chest radiographs from 1 day earlier , there is little overall change . Trace left pneumothorax persists . Small left pleural effusion with associated left lower lobe atelectasis is mildly improved . No effusion on the right . An ill - defined opacity in the right lower lung zone is unchanged and likely reflects atelectasis or pneumonia . No new focal consolidation . No central vascular congestion or overt pulmonary edema . The cardiomediastinal silhouette is stable . Subcutaneous emphysema over the left lateral chest wall continues to improve .
    OUTPUT:
    
1 . Persistent trace left apical pneumothorax . 2 . Mildly improved small left pleural effusion with associated atelectasis . 3 . Stable ill - defined consolidation in the right lower lung , suggestive of atelectasis or developing pneumonia . No new focal consolidation .