Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of right - sided pigtail catheter with re-expansion of the lung . Trace residual pneumothorax identifiedat the apex . The cardiomediastinal silhouette is normal without mediastinal shift .
    OUTPUT:
    
Right pigtail catheter placement with only trace residual right apical pneumothorax .