Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate a large right - sided pleural effusion with compressive atelectasis . The left lung is clear . There is no pneumothorax . Assessment of the cardiomediastinal and hilar contours is limited given the large right - sided pleural effusion .
    OUTPUT:
    
Large right - sided pleural effusion with compressive atelectasis .