Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right upper mediastinal contour is bulging ( part of this area is imaged on a CT of the cervical spine performed on the same day , suggesting a cystic lesion in the area ) , not significantly changed although long - term follow - up is not available . The heart is normal in size . The mediastinal and hilar contours are otherwise unremarkable . The lung fields appear clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . No evidence of injury . 2 . Widening of the right mediastinum , probably reflecting a cystic lesion . Investigation with chest CT , preferably with intravenous contrast , if possible , is suggested when clinically appropriate .