Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior chest radiograph on ___ , there has been interval placement of a left - sided pigtail catheter . A small left apical pneumothorax has resulted . No pneumothorax on the right . Left pleural effusion has essentially resolved . No pleural effusion on the right . Patchy opacities in the right lung apex and right lung base appear slightly more dense and concerning for evolving infection . Cardiomediastinal contours are unchanged . Right pectoral pacer leads terminate in the right atrium and right ventricle , as expected .
    OUTPUT:
    
1 . New small left apical pneumothorax status post chest tube placement . 2 . Slight interval worsening of right apical and right lung base opacities , concerning for evolving infection .