Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right lower lobe suspicious mass seen on prior chest CT dated ___ reflects the right lower lobe opacity seen on today 's chest x-ray . There is a small right pleural effusion . There is no evidence of pneumothorax . Chain sutures seen in the right lower lung . The bony structures are unremarkable .
    OUTPUT:
    
1 . Right lower lobe opacity , reflecting known right lower lobe mass seen on ___ chest CT . 2 . Small unchanged right pleural effusion .