Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear of focal consolidation , pleural effusion or pneumothorax . The heart size is normal . The mediastinal contours are normal . Vertical linear markings over the left lung likely reflect the patient 's hair though pneumomediastinum is another possibility .
    OUTPUT:
    
Vertical linear markings over the left lung may be from the patient 's hair though pneumomediastinum is possible . Recommend repeat chest radiograph following repositioning of the patient 's hair .