Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the most recent radiograph , there has been interval removal of the right PICC line with a small interval decrease of the persistent left pleural effusion . The cardiomediastinal and hilar contours are unchanged and normal . The right lung is similarly unchanged in appearance .
    OUTPUT:
    
Improved , but persistent , small left pleural effusion with interval removal of the right PICC line .