Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chronic scarring involving the bilateral upper lobes is not significantly changed in appearance , and is better characterized on prior CT . Interval increase in heterogeneous opacification of the left lung , with more consolidative retrocardiac opacity containing air bronchograms , is most consistent with left lower lobe pneumonia . Additionally , there has been interval development of the moderate - sized left pleural effusion . The heart remains enlarged . The aorta is tortuous . No pneumothorax .
    OUTPUT:
    
1 . Interval increase in heterogeneous opacification of the left lung , with more consolidative retrocardiac opacity containing air bronchograms , most consistent with left lower lobe pneumonia . 2 . Interval development of left basilar effusion , which is now moderate in size .