Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest provided . There is a small left apical pneumothorax , larger since prior study from 4 days ago . Left - sided pleural drainage catheter is in unchanged position . Left basilar plate - like atelectasis is again seen . The right lung is clear . Cardiomediastinal and hilar structures are normal . There is no pleural effusion .
    OUTPUT:
    
Larger left apical pneumothorax since prior study from 4 days ago .