Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased interstitial markings again seen throughout the lungs . New retrocardiac opacity is seen silhouetting the descending thoracic aorta . There is no large effusion . The cardiomediastinal silhouette is stable . Hypertrophic changes and vertebroplasty changes are noted in the spine .
    OUTPUT:
    
Retrocardiac opacity which may represent pneumonia . Pulmonary vascular congestion . Recommend repeat after treatment to document resolution