Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a persistent small right apical pneumothorax overall unchanged in size from the prior exam done at 05 : 50 . A right - sided pigtail catheter is unchanged in appearance . Subcutaneous emphysema on the right is unchanged . There may be a very small right pleural effusion and right basal atelectasis appears improved .
    OUTPUT:
    
Stable small right apical pneumothorax . Interval decrease in right basal atelectasis .