Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest demonstrates stable configuration of a left transthoracic chest catheter with a pigtail terminating apically . There is a persistent moderate left apical pneumothorax , unchanged since ___ : 54 on ___ , but decreased since ___ : 28 on ___ . There is persistent lingular atelectasis . Patient is rotated to the right , limiting assessment of the cardiomediastinum . There is no right pneumothorax . Lung volumes remain decreased . Small amounts of bilateral subcutaneous emphysema persist . Known left mid clavicular fracture has been reduced to near anatomic position . A few known left - sided rib fractures are not well seen .
    OUTPUT:
    
1 . Persistent moderate left apical pneumothorax . 2 . Persistent subcutaneous emphysema . 3 . Known left rib fractures not well seen . 4 . Post reduction left clavicular fracture .