Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is contour loss of the aortic notch , loss of aortopulmonary window , and abnormal bulging contour of the left perihilum . On lateral view , there is fullness of the retrosternal space . These findings are suggestive of a large perihilar process , for example lymphoma . There is otherwise no focal consolidation . Pulmonary vasculature is normal . Heart size is normal . Bony structures are normal .
    OUTPUT:
    
Constellation of findings suggestive of a large perihilar process , for example lymphoma . CT is recommended for further evaluation .