Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild prominence of interstitial markings is again noted and stable in comparison to prior studies , likely chronic . There is increased opacity overlying the right lower lobe which may be representative of a developing pneumonia . Otherwise , the remainder of the lungs are clear . Cardiomediastinal silhouette remains stable . The aorta appears mildly tortuous .
    OUTPUT:
    
Opacity overlying the right lower lobe may be representative of a developing pneumonia .