Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bibasilar pleural effusions are again seen with compressive atelectasis at the lung bases , similar in appearance to the prior exam . A superimposed infectious process should be considered if there are clinical symptoms . The cardiomediastinal silhouette and hilar contours are unchanged . There is no evidence of pneumothorax .
    OUTPUT:
    
Bilateral effusions with compressive atelectasis at the bases . Superimposed pneumonia should be considered if there are clinical symptoms .