Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . Again seen is a large left perihilar mass with fiducial marker . The mass obscures the left heart border . The right lung is grossly clear . No acute osseous abnormality is detected .
    OUTPUT:
    
Left lung mass is again seen without definite superimposed acute cardiopulmonary process . Please see subsequent CT scan for additional details .