Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable single frontal chest radiograph was obtained . The previous right upper lobe parenchymal opacities are not well seen and are replaced by an area of linear atelectasis . No pleural effusion or pneumothorax is seen . The cardiomediastinal silhouette is normal . There is persistent right hilus enlargement , consistent with known hilar mass and adenopathy .
    OUTPUT:
    
1 . No pneumothorax appreciated . Right upper lobe atelectasis . 2 . Known right hilar lung mass with central lymphadenopathy .