Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate interval resolution of left apical pneumothorax with mild left apical pleural scarring . Otherwise , the lungs are clear . The mediastinal and hilar contours are normal . No pleural effusion is detected .
    OUTPUT:
    
Interval resolution of left apical pneumothorax .