Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . The cardiac , mediastinal and hilar contours appear stable . There is again a small pleural effusion on the right . The right lung appears clear . On the left , there is a small hydropneumothorax with increased fluid content , and small residual pneumothorax component , the latter apparently not increased . Mild volume loss at the left base is also similar in extent .
    OUTPUT:
    
Increased left pleural effusion associated with a small hydropneumothorax , otherwise unchanged .