Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest demonstrate normal heart size . There is increased opacity along the right upper mediastinal border corresponding to mediastinal mass seen on CT anterior to the lower trachea , not significantly changed from a chest radiograph of ___ . The descending aorta is tortuous . The lungs are clear . No pleural effusion or pneumothorax . No displaced rib fracture identified .
    OUTPUT:
    
No evidence of pneumonia . Unchanged opacity along the right upper mediastinal border consistent with mass seen on CT anterior to the trachea .