Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided Port - A - Cath catheter remains in unchanged position , likely terminating at the cavoatrial junction . A right sided pleural effusion is unchanged . There is bibasilar atelectasis . There is no pneumothorax . The cardiomediastinal and hilar contours are stable .
    OUTPUT:
    
Stable right - sided pleural effusion . However , in the appropriate clinical setting , a superimposed pneumonia can not be entirely excluded .