Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the prior examination , there is no change . Enlargement of the cardiac silhouette and widening of the mediastinal from known aortic dissection are unchanged . The lungs are clear . There is no pulmonary edema , consolidation or pleural effusion . No pneumothorax
    OUTPUT:
    
1 . Stable cardiomegaly and mediastinal widening from known aortic dissection .