Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is persistent large left pleural effusion with associated atelectasis , stable in appearance as compared to the prior study . There is very slight rightward shift of the cardiac silhouette , stable . There is slight blunting of the posterior right costophrenic angle which may be due to a trace right pleural effusion . No focal consolidation is seen in the right lung . There is no pneumothorax . The cardiac and mediastinal contours are stable , although not well evaluated given the large left pleural effusion .
    OUTPUT:
    
Stable large left pleural effusion with overlying atelectasis . Possible trace right pleural effusion .