1, Highest mediastinal lymph nodes. 2, Upper paratracheal lymph nodes. 3.Anterior tracheal lymph nodes. 4.Inferior paratracheal lymph nodes. 5.Aortic window lymph nodes. 6.Para-aortic lymph nodes. 7.Inferior bulbar lymph nodes. 8.Paraesophageal lymph nodes. 9.Lymph nodes of the inferior pulmonary ligament. 10.Pulmonary hilar lymph nodes. 11.Interlobular lymph nodes. 12.Lobar bronchial lymph nodes. 13.Segmental parabronchial lymph nodes. 14.Subsegmental parabronchial lymph nodes.