Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small left apical pneumothorax is overall unchanged compared to the prior examination . Pigtail pleural catheter and Port - A - Cath are unchanged in position . Cardiomediastinal silhouette is stable . A small linear opacity along the periphery of the left mid / lower lung likely represents atelectasis . A small left pleural effusion is unchanged .
    OUTPUT:
    
Persistent small left apical pneumothorax and small left pleural effusion with pigtail pleural catheter in place .