Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . The lungs are well expanded and clear . There is no focal consolidation , effusion , or pneumothorax . Borderline cardiomegaly is chronic . Mediastinal contours are normal . There are no displaced rib fractures .
    OUTPUT:
    
Chronic borderline cardiomegaly .