Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . Better seen in the lateral view there is a right lower lobe opacity at least in part due to pleural effusion . The left lung is clear . There is a large mass in the upper mediastinum , , larger on the right when compared to the left with associated narrowing of the trachea at the thoracic inlet which is also displaced anteriorly . Cardiac size is normal . There is no pneumothorax .
    OUTPUT:
    
1 . Right greater than left upper mediastinal mass with mass effect on and apparent narrowing of the trachea , likely an enlarged thyroid , could be further assessed with CT . 2 . Small right effusion with possible associated consolidation .