Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Comparison is made to prior study from ___ . There is a more focal area of consolidation within the lung bases , particularly on the left side . This may represent developing pneumonia . There is a left retrocardiac opacity as well . There is an endotracheal tube whose distal tip is 3 .4 cm above the carina . There is a right - sided central line with distal lead tip at the cavoatrial junction . An old healed right humeral head fracture is seen .
    OUTPUT:
    
Increasing opacity at the left lung base and left retrocadiac opacity which may represent developing pneumonia .