Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extensive subcutaneous emphysema involving the entire chest and lower neck is unchanged . Evaluation of the lungs is limited due to linear opacities from subcutaneous air collections . Within this limitation , a small right apical pneumothorax likely persists . Pleural fluid is small in amount , if any . There is increased opacification of the the right lung base , likely reflecting collapse . The cardiomediastinal contours are within normal limits . Extensive pneumomediastinum is not significantly changed from ___ .
    OUTPUT:
    
1 . Persistent tiny right apical pneumothorax . 2 . No significant change in pneumomediastinum . 3 . Extensive subcutaneous emphysema , similar to prior exam .