Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is chronic left - sided volume loss from prior left upper lobe resection with associated leftward shift of mediastinal structures and elevation of the left hemidiaphragm , unchanged from prior examination . Heart size is difficult to evaluate due to shift of mediastinal structures ; however , appears within normal limits . Hilar contours are unremarkable . The lungs are clear . There is no pleural effusion or pneumothorax . A moderate - sized hiatal hernia is again noted , best identified on the lateral view .
    OUTPUT:
    
1 . Chronic left - sided volume loss from prior upper lobe resection . No acute cardiopulmonary abnormality given chronic post-operative changes . 2 . Moderate - sized hiatal hernia .