Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , lung volumes have increased with increased aeration of the left lung . Left basilar opacity is likely a combination of pleural fluid and atelectasis , similar to the prior study . Cardiac silhouette is stable . Mediastinum is smaller and pulmonary edema has improved since ___ . A left apical pneumothorax is tiny .
    OUTPUT:
    
Tiny left apical pneumothorax .