Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low . Heart size is normal . Rightward deviation of the trachea with focal airway narrowing is unchanged and due to a large thyroid goiter . The mediastinal and hilar contours are otherwise unchanged , and no pulmonary vascular congestion is demonstrated . No pleural effusion or pneumothorax is seen . Multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Rightward deviation of the trachea with focal narrowing is compatible with known goiter .