Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval development of a small left apical pneumothorax . Increased left pleural effusion . Improved subcutaneous emphysema in the chest wall and neck . Unchanged atelectasis at the left base . No cardiomegaly . Position of left chest tube is unchanged .
    OUTPUT:
    
Interval development of a small left apical pneumothorax . Decreased subcutaneous emphysema . Increased left pleural effusion .