Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Enlargement of the cardiomediastinal silhouette is grossly stable since at least ___ , given differences in patient inspiration and position / technique . No focal consolidation is seen . There is no pleural effusion or pneumothorax . No pulmonary edema is seen .
    OUTPUT:
    
Persistent enlargement of the cardiomediastinal silhouette stable since at least ___ ; patient has known fusiform descending thoracic aortic aneurysm , better assessed on CT . No focal consolidation , pleural effusion , or pneumothorax .