Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate well - expanded and clear lungs . Cardiomediastinal and hilar contours are unremarkable . A small left - sided apical pneumothorax remains . There is no pleural effusion or consolidation .
    OUTPUT:
    
A small left - sided apical pneumothorax remains .