Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . There are an irregular perihilar opacities bilaterally which are present on prior chest CT but have developed since prior chest x-ray . These could be related post radiation changes although recurrent tumor is also possible . Increased interstitial markings more conspicuous at the left lung base with possible more confluent consolidation in the retrocardiac region . New nodular opacity also seen at the left lung base not identified on prior CT . Blunting of the costophrenic angles most suggestive of effusions . Cardiomediastinal silhouette is stable and again notable for right paratracheal adenopathy .
    OUTPUT:
    
Increased perihilar interstitial markings bilaterally could in part be from postradiation changes however recurrent tumor is also possible . Asymmetric left basilar opacity could represent superimposed infectious process . Consider PA and lateral for more clear delineation of these findings when patient is amenable . Nodular focus at the left lung base could be further characterized at this time as well .