Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Allowing for differences in technique , the cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . There is increased left hilar fullness since the prior radiographs ; previously CT showed lymphadenopathy so this may have increased .
    OUTPUT:
    
1 . New interstitial abnormality ; airway inflammation , atypical infection or vascular congestion could be considered . 2 . Possibility of increased mediastinal lymphadenopathy . Chest CT advised in follow - up .