Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A pigtail catheter projects over the left lung apex , unchanged . The large left pneumothorax is minimally improved from the prior study . The small left pleural effusion has slightly increased . Opacity in the left lower lung , which developed after ___ after pigtail insertion , is improving . The right lung is well aerated and clear . Heart size is normal . Mediastinal silhouette and hilar contours are normal .
    OUTPUT:
    
Large left hydropneumothorax with slightly increased fluid and decreased air .