Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Symmetric mild widening of the superior mediastinum without tracheal deviation may be due to mediastinal fat or enlarged thyroid gland . The mediastinal and hilar contours are otherwise unremarkable . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . Mild loss of height of a mid thoracic vertebral body is of indeterminate age . For mild degenerative changes seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Mild widening of the superior mediastinum which could be due to mediastinal fat or enlarged thyroid gland , and clinical correlation is recommended .