Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size appears unchanged , mildly enlarged . Mediastinal and hilar contours are stable . Pulmonary vasculature is normal . Patchy opacities in the lung bases likely reflect areas of atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . Severe S - shaped thoracolumbar scoliosis is present .
    OUTPUT:
    
Bibasilar atelectasis / scarring .