Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are fully expanded . No pleural abnormalities . Heart size is normal . Mild prominence of the right hilum is unchanged since at least ___ . However , there is subtle indistinctness of the hilar borders possibly reflecting edema . Tortuosity of the descending thoracic aorta is again seen .
    OUTPUT:
    
Possible mild edema . No evidence of pneumonia .