Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided nerve stimulator device is noted with the lead coursing cephalad into the neck . Heart size is normal . The mediastinal and hilar contours are unchanged with multiple calcified left - sided mediastinal and left hilar lymph nodes re - demonstrated , compatible with prior granulomatous disease . Lung volumes are low . There is mild bibasilar atelectasis . No focal consolidation , pleural effusion or pneumothorax is identified . Old distal right clavicular fracture is re - demonstrated .
    OUTPUT:
    
Mild bibasilar atelectasis .