Target Volume Determination 2015

The thoracic duct lies on the left side, and the left recurrent laryngeal nerve lies in the left tracheoesophageal groove. Laterally, on the left side, it is related to the aorta and left subclavian artery; on the right side, it is related to the azygos vein.

In the posterior mediastinum, the oesophagus is related to the descending thoracic aorta, left mediastinal pleura, azygos vein, and cardiac and pulmonary pleura

Anteriorly, the oesophagus is related to the trachea, right pulmonary artery, left bronchus, pericardium with left atrium, and diaphragm.