Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A ventriculoperitoneal shunt courses across the chest to the right of midline . There is a large pleural effusion , including opacification of the lower two - thirds of the right hemithorax with balanced mass effect , noting only mild leftward shift of mediastinal structures . This implies that there is extensive atelectasis associated with parts of the right lung . Part of the right lung apex appears normally aerated , however . There is no definite pleural effusion on the left . The left lung remains clear . Findings in the right chest are new .
    OUTPUT:
    
New large right - sided pleural effusion .