Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is extensive opacification involving the right hemithorax new from ___ . Opacification involving the left upper lung is similar in appearance to ___ . Left basilar opacity is also noted and likely represents a combination of atelectasis and effusion . Opacity in the left medial mid lung may correspond to a large bony metastasis seen on prior thoracic spine CT . Cardiac silhouette is unchanged . No pneumothorax . Spinal fusion hardware is again seen .
    OUTPUT:
    
Large opacification involving the right hemithorax , new from prior as well as persistent left upper lung opacification could represent infection or spread of metastatic disease , edema is less likely given asymmetry .