Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is prominent convexity of the lower right mediastinal contour which is nonspecific but may represent a tortuous ascending aorta or lymphadenopathy . The heart size is normal . Lungs are clear without focal consolidation , pleural effusion , or pneumothorax .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Prominence of the lower right mediastinal contour , for which non-emergent chest CT is recommended to distinguish a tortuous or dilated ascending aorta from a low lying anterior mediastinal mass such as a thymoma .