Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been slight interval decrease in small to moderate left pneumothorax , and a stable small left pleural effusion . The right lung remains clear . The heart and mediastinum are within normal limits . Multiple left rib fractures are also noted .
    OUTPUT:
    
Slight interval decrease in small to moderate left pneumothorax . Stable small left pleural effusion . Clear right lung .