Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to prior radiograph from ___ , there has been interval removal of the left pigtail catheter . There is no pneumothorax . The extent of the left pleural effusion has decreased . A small left sided effusion persists . There is retrocardiac atelectasis . The heart is enlarged . Surgical clips are seen within the left axilla .
    OUTPUT:
    
Small left - sided pleural effusion with no evidence of pneumothorax .