Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the chest x-ray from this date , there has been a slight increase in the size of a small right apical pneumothorax with a pigtail catheter in place . Again , the tip of the Port - A - Cath appears to be at the cavoatrial junction on the current study . No other significant changes since the prior radiograph from earlier on the same date .
    OUTPUT:
    
Slight increase in the size of the right apical pneumothorax , with interval placement of a right - sided pigtail catheter .