Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable view of the chest . The small left apical pneumothorax has slightly increased in size compared to prior study . Left chest tube is unchanged in position , ending in the left lower hemithorax . Mild left chest wall emphysema again noted near chest tube insertion . Heart size is unchanged . No focal consolidations or pleural effusion .
    OUTPUT:
    
Slight increase in size of small left apical pneumothorax .