Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable view of the chest . There has been placement of a left pigtail catheter which overlies the left upper hemithorax . There has been significant decrease in left pneumothorax , now small . There is a small left pleural effusion and adjacent atelectasis . Again seen are malposition pacemaker leads .
    OUTPUT:
    
Decreased left pneumothorax after pleural catheter placement , now small .