Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval removal of the left - sided chest tube . No pneumothorax seen . A left perihilar opacity likely reflects a small amount loculated pleural fluid , a tiny adjacent metallic density is likely a surgical clip . This is unchanged in appearance compared to the prior study . The right lung appears grossly clear . Volume loss in the left lung consistent with recent surgery . Small amount surgical emphysema . Degenerative changes throughout the thoracic spine .
    OUTPUT:
    
No pneumothorax seen . A perihilar opacity at the left hilum may reflect loculated pleural fluid versus a parenchymal hematoma .