Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . No focal consolidations . No pleural effusion or pneumothorax . RIGHTWARD MEDIASTINAL WIDENING IS TO SOME EXTENT A FUNCTION OF LOWER LUNG VOLUMES AND POSITIONING , BUT RAISES CONCERN FOR NEW MEDIASTINAL FLUID COLLECTION , OR EVEN DILATATION OF THE AORTA . LUNGS ARE CLEAR . THERE IS NO PLEURAL ABNORMALITY . MISALIGNMENT OF THE STERNAL WIRES NOW INVOLVES THE LOWEST WIRE .
    OUTPUT:
    
POSSIBLE NEW MEDIASTINAL FLUID COLLECTION . PROGRESSIVE STERNAL INSTABILITY .