Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a subtle density at the medial right lung base . In the right clinical setting , this could represent an early right middle lobe pneumonia . The cardiomediastinal silhouette is normal . Median sternotomy wires are intact . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Subtle opacity at the medial right lung base could represent an early right middle lobe pneumonia in the correct clinical setting .