Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , there has been interval increase in density and extension of an opacity in the right mid lung zone . There has also been interval progression of opacities in the right lower lung . Left lung is clear . Costophrenic sulci are blunted bilaterally , likely related to pleural thickening . There is no pneumothorax . The cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
Increased density and extension of right mid lung opacity and progression of right lower lung opacities , concerning for worsening pneumonia .