Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single right chest drain tube is seen with its tip ending near the lung apex . Mild - to - moderate pneumothorax seen on previous radiograph dated ___ has completely resolved . No residual pneumothorax . Cardiomediastinal silhouette is stable .
    OUTPUT:
    
Interval resolution of mild - to - moderate pneumothorax . No residual pneumothorax .