Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since comparison exam , left pneumothorax has mildly decreased in size , with less apparent basilar component . Left apical pneumothorax component is similar . Mildly improved subcutaneous emphysema left neck , chest wall . Mildly increased left basilar opacity , likely atelectasis . Otherwise , no significant change . Stable right lung findings .
    OUTPUT:
    
Mildly improved left pneumothorax .