Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded . There are bilateral diffuse interstitial abnormalities which have minimally progressed since ___ . There is a 2 .2 cm nodule at the left base that has been previousuly worked up and is stable . In addition to this , there is a new superimposed left lower lobe infiltrate and likely small pleural effusion . Median sternotomy wires appear intact . There is no pneumothorax .
    OUTPUT:
    
1 . Worsening opacity at the left base superimposed is worrisome for pneumonia . 2 . known left basilar nodule