Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to ___ study the esophageal stent is unchanged in position . There is a change in morphology of the moderate left pleural effusion that now again contains air - fluid levels that new or if the appearance is due to change in distribution . A loculated portion of the fluid collection persists in the posterior pleural space versus mediastinum . The right lung is clear . A right PIC line is again seen which terminates in the cavoatrial junction .
    OUTPUT:
    
1 . Stable positioning of the esophageal stent . 2 . Morphologically changed left pleural effusion with air - fluid levels that represent new air collections or the redistribution of previous loculations .