Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The cardiomediastinal and hilar contours are normal . There is increase in size of pulmonary arteries which may represent pulmonary hypertension . No focal consolidations . Multiple endobronchial coils are again seen . Possible vague opacity in the left lower lobe .
    OUTPUT:
    
Possible vague opacity in the left lower lobe may represent atelectasis or early pneumonia , difficult to completely evaluate because no prior post-operative lateral films .