Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left pectoral pacemaker is in place with two leads terminating in the right atrium and right ventricle . The lungs are symmetrically expanded and well aerated without focal consolidation concerning for pneumonia . No pleural effusion or pneumothorax is detected . The pulmonary vasculature is not engorged . The cardiac silhouette is top normal in size . Widening and convex lateral bulging of the right upper mediastinum extending above the thoracic inlet , obliteration of the right paratracheal stripe and leftward displacement of the trachea indicate a cervicothoracic mass most commonly adenopathy or abnormal thyroid The remainder of the mediastinal contour is within normal limits . Lungs are clear
    OUTPUT:
    
Cervicothoracic mass . Investigation with CT indicated if not already evaluated .