Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate a small left apical pneumothorax measuring and 10 mm . The lungs are clear . There is a small to moderate left pleural effusion with associated atelectasis . The cardiomediastinal and hilar contours are unchanged . Left rib and clavicular fractures are unchanged .
    OUTPUT:
    
Residual small left apical pneumothorax . Small to moderate left pleural effusion .