Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to ___ portable chest radiograph , the small left apical pneumothorax is increased in size from 5 mm to 10 mm . . The right lung well expanded and clear . The cardiomediastinal silhouette , hila , and pleural surfaces are normal .
    OUTPUT:
    
1 . Interval increase in size from 5 mm to 10 mm of left apical pneumothorax when compared to ___ portable chest radiograph .