Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single - view of the chest provided demonstrates a dual lead pacer in unchanged position with lead tips extending into the right atrium and right ventricle . There is left basilar opacity , new from prior exam likely representing a combination of consolidation and effusion . There is dense pleural calcification outlining the right mid and lower lung . Right apical pleural thickening is again noted . Heart size is difficult to assess .
    OUTPUT:
    
New opacity at the left lung base which could represent a combination of effusion and consolidation .