Contents of the mediastinum: Right lateral view (English)

The esophagus courses longitudinally throughout the mediastinum, posterior to the trachea and main bronchi and anteromedial to the azygos vein. The pericardial sac can be seen anteriorly, with its contents and adjacent structures forming the middle compartment of the inferior mediastinum. Pericardiophrenic arteries and veins are also seen abutting the pericardial sac.