Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a left - sided pigtail catheter with re-expansion of the left lung . Tiny left apical pneumothorax persists . Streaky left mid and upper lung opacities are likely atelectasis . Cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Interval placement of a left pigtail catheter with only trace residual left apical pneumothorax .