Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable radiograph of the chest demonstrates interval increase in size of left apical pneumothorax since the prior study . The left pigtail pleural catheter is unchanged in position . Gastric distention has decreased since the prior study . Otherwise , the right lung is unchanged .
    OUTPUT:
    
Interval increase in size of left apical pneumothorax . A left pleural pigtail catheter is unchanged in position . Decreased gastric distention .