Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extremely low lung volumes . Heart size is unchanged . The mediastinal and hilar contours are likely normal , allowing for patient rotation . The patient is status post cardiac valve replacement with median sternotomy wires . There is diffuse lung disease , likely edema . No pleural effusion or pneumothorax is seen . As before , partially visualized VP shunt .
    OUTPUT:
    
There is diffuse lung disease , likely edema .