Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with ___ , there is mild increase in blunting of the left hemidiaphragm , with a most conspicuous meniscus seen in the left posterior costophrenic sulcus in the lateral view compatible with increasing pleural effusion . Biapical scarring is present but there is no focal opacity to suggest pneumonia . Cardiac size is mildly enlarged , but otherwise the cardiomediastinal and hilar contours are unremarkable . There is no right - sided pleural effusion . No pneumothorax is identified .
    OUTPUT:
    
Slightly worsening left - sided pleural effusion . No evidence of pneumonia .