Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is increased opacity at the right lung base right lower lobe which could be due to early infection or aspiration . Slight blunting of the right costophrenic angle may be due to a trace pleural effusion . Left lung is clear . The superior mediastinum is widened ; as seen on PET CT from ___ there is mediastinal lymphadenopathy .
    OUTPUT:
    
Subtle increased right lower lobe opacity could be due to early infection versus atelectasis in the appropriate clinical setting . Widened superior mediastinum corresponds to underlying lymphadenopathy as seen on recent prior PET - CT from ___ .