Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate persistent postoperative changes consistent with right middle lobectomy . Left - sided pleural effusion has decreased in size and now is tiny . There has been interval resolution of the left - sided pneumothorax . A small right apical pneumothorax persists . Cardiomediastinal and hilar contours are unchanged .
    OUTPUT:
    
Persistent small apical right - sided pneumothorax and resolution of left - sided pneumothorax .