Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to ___ 11 : 44 am chest radiograph , there has been interval expansion of the left - sided pneumothorax from that third posterior interspace seen in prior study to the fourth posterior interspace . The left pneumothorax is now moderate - sized . The pacemaker is visualized on the left chest wall and pacer wire terminates in the right ventricle .
    OUTPUT:
    
In comparison to ___ at 11 : 44 am chest radiograph , there is interval expansion of the left - sided pneumothorax . The left pneumothorax a small - moderate sized .