Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal contour is markedly abnormal with moderate cardiomegaly but marked prominence of the aortic arch , this consistent with the patient 's known dissection and aortic root graft . No consolidation or pneumothorax seen . No pleural effusion seen .
    OUTPUT:
    
No significant interval change when compared the prior study . Markedly abnormal appearance of the thoracic aorta is similar when compared to the prior study .