Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , previously described , bilateral , asymmetric , paracardiac opacity is unchanged on the right side and minimally worse on the left side . Upper lungs are clear and no new opacities . There is no pleural effusion . Heart size is normal . Mediastinal and hilar contours are stable .
    OUTPUT:
    
Since ___ , previously described , asymmetric , bilateral , paracardiac opacity is unchanged on the right and minimally worse on the left side . No new opacities of concern .