Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is significant bilateral hilar fullness and mediastinal enlargement , without mass effect on the trachea . The heart appears top normal in size . The lungs are otherwise clear without focal consolidation or pleural effusion .
    OUTPUT:
    
Significant bilateral hilar fullness and mediastinal enlargement , present on the outside hospital radiographs from ___ . However there are no other studies available for comparison . These findings are concerning for an intrathoracic mass , and therefore CT of the chest is recommended for further workup .