Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There has been significant interval increase in the left pleural effusion . Underlying pneumonia is suspected given subtle air bronchograms projecting over the left lower lung . There is significant collapse of the lingula and left lower lobe . Right lung remains clear . Heart size can not be assessed . Bony structures intact .
    OUTPUT:
    
Interval increase in left pleural effusion and lower lung collapse . Underlying pneumonia is suspected .