Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Large mediastinal mass occupying most of the superior aspect of the right hemithorax grossly unchanged . Large right - sided pleural effusion appears similar in size compared to previous imaging . Tracheostomy tube in situ . Improved aeration of the right lower lobe . Right main bronchial stent unchanged in position . The known small left pleural effusion previously noted on CT is not seen on plain film . The nasogastric tube projects over the central mediastinum with its tip incompletely imaged .
    OUTPUT:
    
Large right pleural effusion and huge upper mediastinal mass unchanged . Improved aeration of the right lower lobe .