Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are new bibasilar opacities , greater on the left . The left hilum is prominent . The heart is normal in size . A nodule in the right upper lobe corresponds to the FDG - avid right upper nodule identified on prior PET - CT . Focal lucencies indicate that this lesion may be cavitated .
    OUTPUT:
    
1 . New bibasilar opacities may represent peribronchial pneumonia . 2 . Right upper lobe nodule is probably a metastasis and may have become cavitary since PET - CT on ___ .