Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates minimal persistent left - sided apical pneumothorax status post chest tube placement . The lungs are hyperinflated . There is left basalar atelectasis . The cardiomediastinal and hilar contours are unchanged . Anchor screws project over the right proximal humerus .
    OUTPUT:
    
Small left - sided apical pneumothorax status post chest tube placement .