Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is vague opacity projecting over the left lung which has increased since ___ . Given findings on prior PET , this may be due known underlying mesothelioma . Elsewhere , lungs are grossly clear besides right basilar calcified granulomas and biapical scarring cardiomediastinal silhouette is stable . Tortuosity of the descending thoracic aorta is again noted . No acute osseous abnormalities .
    OUTPUT:
    
Vague opacity projecting over the left mid lung which is new since prior but may be due to known underlying mesothelioma as opposed to new underlying parenchymal process although this would be difficult to exclude entirely .