Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate clear lungs with no evidence of infiltrate . The cardiac and mediastinal contours are normal aside from prominence of the right mediastinal contour which is likely ascending aorta but in a patient with known malignancy , is concerning for possible lymphadenopathy . No pleural abnormality is detected . Interposition of colon between the right hemidiaphragm and liver is seen . The patient is status post left nephrectomy with surgical clips in the abdomen .
    OUTPUT:
    
Right mediastinal fullness which may be concerning for lymphadenopathy in a patient with known malignancy . Recommend CT to further evaluate mediastinum .