Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs were obtained . There is a persistent small left apical pneumothorax . There is scarring at the left lung base . No focal consolidation or pulmonary edema is seen . Small bilateral pleural effusions are present . The heart size is in the upper limit of normal . Mediastinal and hilar contours are stable .
    OUTPUT:
    
Persistent small left apical pneumothorax .