Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Poorly defined opacity has developed within the right middle lobe lateral segment , and could potentially represent a developing pneumonia . The lungs otherwise appear unchanged from the prior study with persistent area of lingular scarring adjacent to a prominent pericardial fat pad . Heart is normal in size . Aorta is tortuous , without change from prior study . No pleural effusion or acute skeletal finding .
    OUTPUT:
    
Findings concerning for developing pneumonia in right middle lobe .