Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Opacity in the inferior right upper lung zone may be within the superior segment of the low right lower lobe however there may also be involvement of the right upper lobe , worrisome for pneumonia . There is no pleural effusion . The left lung is clear . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Right - sided pneumonia possibly involving the superior segment of the right lower lobe with possible involvement of the inferior right upper lobe .