Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Median sternotomy wires are intact . Heart size is normal . Postoperative cardiomediastinal silhouette and hilar contours are unremarkable . No evidence of pulmonary edema . No dense consolidation to suggest pneumonia . Small left - sided pleural effusion . Lungs appear hyperinflated , unchanged .
    OUTPUT:
    
1 . Small left - sided pleural effusion . No frank interstitial edema or evidence of pneumonia . 2 . Hyperinflated lungs .