Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to prior , there has been interval progression of diffuse bilateral parenchymal opacities most confluent in the left upper lung and right mid lung . There is no large pleural effusion . There is prominence of the mediastinum on the right including leftward deviation of the trachea at the thoracic inlet . Hila are not well assessed on the current study due to parenchymal opacities but are known to have bilateral enlarged lymph nodes by prior CT . No acute osseous abnormalities .
    OUTPUT:
    
Progression of bilateral parenchymal opacities which may represent pneumonia in the proper clinical setting . Given findings of hilar and mediastinal adenopathy , underlying malignancy would also be possible .