| Anterior |
Visceral (middle) |
Paravertebral (posterior) |
| Thymus |
Pericardium/heart |
Sympathetic chain |
| Internal thoracic vessels |
Great vessels |
Proximal intercostal nerve, artery, and vein |
| Internal thoracic lymph nodes |
Trachea |
Posterior paraesophageal lymph nodes |
| Fat and connective tissue |
Proximal right and left mainstem bronchi |
Intercostal lymph nodes |
| |
Esophagus |
|
| Phrenic nerve |
| Thoracic duct |
| Proximal azygos vein |
| lymph nodes |
| Fat and connective tissue |
