Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right hemithorax is opacified with volume loss . The lateral view suggests a large mass , which is located posteriorly , probably in the left lower lobe . There is probably a very small pleural effusion on the left . Nodular opacities are widespread in the left lung , suggesting metastases .
    OUTPUT:
    
Volume loss and opacification of the right hemithorax . Correlation with surgical history is recommended . This appearance could be normal after prior pneumonectomy , but may reflect a large malignant pleural effusion otherwise with substantial atelectasis . Widespread nodularity in the left lung is consistent with metastatic disease , but no recent comparison studies are available in our system .