Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Non-displaced anterior fifth left rib fracture is new . Necrotic cavitating right upper lobe mass with air - fluid level was better assessed in previous chest CT . Bibasilar opacities are mostly compatible with aspiration or pneumonia . Pleural effusion is small if any . There is no pneumothorax .
    OUTPUT:
    
1 . The patient is known with right upper lobe lung cancer that has cavitated with bilateral basal opacities that could be compatible with aspiration or pneumonia . 2 . Left fifth anterior rib fracture is new .