Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is similar mild - to - moderate relative elevation of the right hemidiaphragm . Hazy opacity projecting along the left lateral lung base appears increased with a new indistinct margin to the left lateral cardiac border suggesting a lingular opacity . Pleural effusions are difficult to exclude .
    OUTPUT:
    
New suspected lingular opacity . Differential considerations include pneumonia , aspiration or atelectasis . Short - term followup radiographs , preferably with PA and lateral technique if possible , may be helpful to reassess .