Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a persistent small right apical pneumothorax , overall unchanged in size compared to the prior exam . Right - sided pigtail catheter terminates along the medial pleural surface , unchanged in position . There is mild subcutaneous emphysema . Small right pleural effusion and minimal bibasilar atelectasis is persistent . The left lung is clear . Subcutaneous emphysema extends into the soft tissues and neck on the right .
    OUTPUT:
    
Stable small right apical pneumothorax .