Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There is no definite pleural effusion or pneumothorax . There are widespread nodules of medium size throughout each lung , but more extensive and lower than upper lungs , most suggestive of metastatic disease . Although this appearance may obscure subtle evidence for pneumonia , there is no definite secondary process .
    OUTPUT:
    
Widespread metastatic disease . No definite evidence of acute superimposed process .