Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Large opacification in the right upper hemithorax / right upper lobe is stable , consistent with patient 's known large right upper lobe mass with right upper airway obstruction . There is mild left base atelectasis . No new focal consolidation is seen . There is no large pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Again seen large right upper lung opacity consistent with known underlying large mass with right upper airway obstruction .