Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an opacity at the right lung base , consistent with known lung malignancy . However , there are additional subtle opacities note is slightly more superiorly in the right midlung , and left lung base which are new compared to the prior CT on ___ . No pleural effusions or pneumothorax . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities identified .
    OUTPUT:
    
Known right middle lobe malignancy . Additional smaller bilateral opacities may represent multifocal pneumonia , better evaluated on the subsequent CT .