Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates unremarkable cardiomediastinal silhouette , stable when compared to prior radiograph dated ___ . Bilateral asymmetric pleural thickening , right greater than left , which appears similar in appearance to prior study obtained ___ years prior and preserved in ratio . No focal opacity is seen which is convincing for pneumonia . There is no pleural effusion . Osseous structures demonstrate no acute abnormality .
    OUTPUT:
    
Asymmetric bilapical pleural thickening , right greater than left , which appears preserved in ratio relative to prior study obtained ___ years ago . This is felt likely to reflect pleural - parenchymal scarring . If , however , referable symptomatology exists clinically , a dedicated CT for further evaluation should be obtained .