Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear and there is no pleural effusion . Mediastinal and hilar contours suggest very mild central adenopathy involving both hila , right lower paratracheal and aortopulmonic region of the mediastinum . Heart size is normal . There is no pulmonary edema . Perihilar vessels are slightly prominent . The imaged upper abdomen is unremarkable .
    OUTPUT:
    
Mild central adenopathy could be reactive to infection , or , if chronic , sarcoidosis or other condition . If not documented as stable by comparison with any prior chest imaging , followup chest radiographs or CT scanning is indicated .