Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and aortic valve replacement . Mild enlargement of the cardiac silhouette is again noted . Mediastinal lymphadenopathy is again noted , most pronounced within the region of the AP window . Pulmonary vasculature is normal . Increased interstitial markings are seen within the periphery of the lung bases compatible with chronic lung disease , better characterized on the recent CT . Lungs are hyperinflated . No focal consolidation , pleural effusion or pneumothorax is present . There are mild degenerative changes noted within the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Unchanged mediastinal lymphadenopathy and mild chronic interstitial abnormality .