Great! Structures counting to Mediastinum superior: thymus, trachea + bifurcation, esophagus, arcus aortae, aorta ascendens, truncus brachiocephalicus, A. carotid communis sinistra, A. sublavia sinistra, Aa.thoracicae internae, V. Cava superior, Vv. brachocephalicae, Nn. vagi, N. laryngeus reccurens sinister, Nn. cardiaci, Nn. phrenici, Truncus lymphaticus dexter, Ductus thoracicus (left)