Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right pleural effusion has substantially increased in size , with a large loculated component laterally in the right mid - to - lower hemithorax , measuring about 7 .2 x 7 .5 cm in diameter . Circumferential pleural opacity probably reflects a combination of pleural fluid and pleural thickening based on review of prior CT scan . Cardiac silhouette remains enlarged . Persistent volume loss in the right hemithorax . Left lung is slightly overexpanded but grossly clear except for an incompletely marginated nodular opacity at the left base which probably reflects a nipple shadow and less likely a discrete pulmonary nodule .
    OUTPUT:
    
Enlarging right pleural effusion with 7 .5 cm diameter loculated component laterally . Given history of bloody pleural fluid , this probably reflects a hemothorax .