Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . The heart is normal in size . There is either eventration of the medial left hemidiaphragm or an old contained diaphragmatic rupture . The mediastinal contours are otherwise normal . There are no definite pleural effusions . No pneumothorax is seen . Healed left - sided rib fractures are noted . Multilevel degenerative changes of the thoracic spine are seen .
    OUTPUT:
    
1 . No acute cardiac or pulmonary findings . 2 . Left hemidiaphragmatic eventration versus a contained chronic tear .