Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided pigtail in situ . The right - sided pleural effusion shows interval increase in size and so does the left mediastinal shift in comparison with prior serial radiographs . Persistent collapsed right lung unchanged . No consolidations seen in the left lung .
    OUTPUT:
    
Interval progression of the right - sided pleural effusion with associated mass effect . Right persistently collapsed lung unchanged .