Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . There is a vague opacity in the right mid lung on the frontal view that was not present on prior exam . The remaining right lung and the left lung are clear . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Vague opacity in the right mid lung might represent early / developing pneumonia in the appropriate clinical setting .