Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate persistent moderate - sized apical pneumothorax on the left , as well as a large left - sided pleural effusion . There is a finger - in - glove appearance of the left upper lung , suggestive of mucus retention within airways . The right lung is clear . The cardiomediastinal and hilar contours are unchanged .
    OUTPUT:
    
1 . Persistent moderate - sized apical pneumothorax on the left . 2 . Large left - sided pleural effusion . 3 . Finger - in - glove appearance of the left upper lung is suggestive of mucus retention within airways . If clinically indicated , CT could be performed for additional evaluation of this finding .