Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A large right lower lobe mass is accompanied by bulky right hilar and subcarinal lymphadenopathy . Additionally , numerous thickened septal lines are present within the right lower lobe , suspicious for lymphangitic spread of tumor . Poorly defined opacities surrounding the right lower lobe and hilar masses could potentially represent a post-obstructive pneumonitis given the change in appearance since the prior scout image of the outside chest CT . Relatively geographically marginated perihilar opacities on the left may reflect radiation changes , and less likely infection . Heart size is normal . A small amount of fluid is present within the right major and minor fissures , as well as a small dependent pleural effusion at the costophrenic angle . Left pleural surfaces are clear . Porta catheter terminates in the superior vena cava . No suspicious lytic or blastic skeletal lesions .
    OUTPUT:
    
1 . Large right lower lobe mass with right hilar and subcarinal lymphadenopathy , in keeping with history of non-small cell lung cancer . Likely associated lymphangitic spread of tumor and small right pleural effusion . 2 . Poorly defined opacities surrounding right lower lobe mass represent a change from outside chest CT and could be due to either post-obstructive pneumonia or hemorrhage .