Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are extensive bilateral pulmonary opacities most likely representing multifocal pneumonia . This is less likely to be florid pulmonary edema due to lack of concomitant pleural effusions or cardiomegaly . Underlying metastatic disease can not be excluded . There is widening of the superior aspect of the mediastinum . The heart is normal in size . A left lateral lower rib appears expanded and sclerotic likely due to metastases better evaluated on prior bone scans .
    OUTPUT:
    
1 . Extensive bilateral pulmonary opacities , likely pneumonia . 2 . Widening of the superior aspect of the mediastinum i s present and can be further evaluated with chest CT if indicated . 3 . Expansion and increased density of a left lateral rib due to known bony metastatic disease .