| 1
.
| Left subclavian artery |
| 2
.
| Left vagus nerve |
| 3
.
| Left common carotid artery |
| 4
.
| Left phrenic nerve |
| 5
.
| Internal thoracic artery (note plexus of nerves from inferior cervical ganglion along proximal part of artery) |
| 6
.
| Mediastinal pleura |
| 7
.
| Anterior mediastinal lymph node (note other nodes and plexus of lymphatic vessels in this area) |
| 8
.
| Superior tracheobronchial lymph node (note lymphatic vessels entering node from lung and inferior part of mediastinum) |
| 9
.
| Pericardium |
| 10
.
| Anterior scalene muscle (cut off) |
| 11
.
| Cupula pleurae |
| 12
.
| Apex of lung |
| 13
.
| Rib II |
| 14
.
| Mediastinal surface upper lobe |
| 15
.
| Costal pleura |
| 16
.
| Costal surface upper lobe |
| 17
.
| Left superior pulmonary vein |
| 18
.
| Bronchopulmonary lymph node |
