Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Following removal of a right - sided chest tube , a tiny right apical pneumothorax has developed . Post-operative volume loss in right hemithorax appears similar to the prior study , in keeping with history of right upper lobe resection . Atelectasis at left base is improving with a residual linear atelectasis remaining . Subcutaneous emphysema in right chest wall is again demonstrated .
    OUTPUT:
    
Tiny right apical pneumothorax following chest tube removal .