Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest . The cardiomediastinal silhouette and hilar contours are stable . The left - sided pacemaker and leads are in unchanged position with leads in expected location of right atrium and right ventricle The lungs are clear . No pleural effusion or pneumothorax . No displaced rib fracture identified . Enlarged right paratracheal stripe is unchanged and may reflect patient 's known enlarged thyroid . There are unchanged aortic knob calcification .
    OUTPUT:
    
Unchanged position of a left - sided pacemaker and leads .