Posterior lymph nodes: lymph nodes located above the horizontal line of the superior border of the aortic arch and below the horizontal line of the superior border of the left cephalic brachial vein, prevascular and posterior tracheal; 4. Inferior paratracheal lymph nodes (including odd vein lymph nodes): above the horizontal line where the superior border of the upper lobe bronchus and the main bronchus intersect Aortic lymph nodes 5.Subaortic lymph nodes (main-pulmonary window); 6.Paraortic lymph nodes (ascending aorta or paraphrenic nerve) Inferior mediastinal lymph nodes 7, subsurface lymph nodes; 8, paraesophageal lymph nodes (below the level of the bulge); 9, pulmonary ligament lymph nodes N1 lymph nodes (with the mediastinal pleural reflex as the demarcation between N1 and N2 lymph nodes) 10, hilar lymph nodes; 11, interlobular lymph nodes; 12, lobar lymph nodes; 13, segmental lymph nodes; 14, subsegmental lymph nodes