Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again demonstrated is subtly increased opacity at the base of the right lung , similar in appearance to multiple prior radiographs . There is no pneumothorax or pleural effusion . The cardiomediastinal and hilar contours are stable .
    OUTPUT:
    
Opacity at the base of the right lung is not significantly changed from multiple prior chest radiographs however this could represent pneumonia in the appropriate clinical setting .