Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are within normal limits . Again seen are numerous cavitary nodules and masses within both lungs diffusely . No overt pulmonary edema is seen , no pleural effusion or pneumothorax is present . Note is made of scarring within the lung apices .
    OUTPUT:
    
Extennsive pulmonary metastases . No definite lobar consolidation concerning for pneumonia .