title: Roentgenogram of the month. Right upper mediastinal mass.
mesh_terms: D000328:Adult; D001013:Aorta, Thoracic; D001027:Aortography; D005471:Fluoroscopy; D006801:Humans; D008297:Male; D008476:Mediastinal Cyst / Q000000981:diagnostic imaging*; D010496:Pericardium; D011877:Radionuclide Imaging; D014683:Vena Cava, Superior / Q000000981:diagnostic imaging