Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are very low , which cause crowding of the bronchovascular structures . There is diffuse bilateral increase in the interstitial markings , peribronchial cuffing and widening of the mediastinum concerning for pulmonary edema and volume overload . Moderate - to - severe cardiomegaly is unchanged . There is no large pleural effusion or pneumothorax . There are anterior bridging syndesmophytes in the thoracic spine . There are old right posterior rib fractures .
    OUTPUT:
    
Mild pulmonary edema has slightly increased since ___ . Severe cardiomegaly is stable . Old right rib fractures .