Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . The lungs appear clear . Mild degenerative changes are similar along the upper to mid thoracic spine , and the patient is status post anterior cervical fusion , incompletely characterized .
    OUTPUT:
    
No evidence of acute disease . There are no pleural effusions or pneumothorax . Mild degenerative changes are present along the thoracic spine .