Figure 1c. Diagrams of the axial anatomy of the chest show the lymph nodes and drainage pathways for lung cancer in different lobes of the lung. All tumors drain to the interlobar and hilar nodes. The separate drainage pathways for tumors of the right upper lobe (black nodes), middle lobe (dark gray nodes), right lower lobe (striped nodes), left upper lobe (crosshatched nodes), and left lower lobe (dotted nodes) are shown. The corresponding American Thoracic Society (ATS) stations are labeled. E = esophagus, TD = thoracic duct. (a) Diagram shows the left paratracheal nodes (LPTN) (ATS station 2L) and right paratracheal nodes (RPTN) (ATS station 2R). LBCV = left brachiocephalic vein, LCCA = left common carotid artery, LSCA = left subclavian artery, RBCA = right brachiocephalic artery, RBCV = right brachiocephalic vein, Tr = trachea. (b) Diagram shows the left paratracheal nodes (LPTN) (ATS station 4L), right paratracheal nodes (RPTN) (ATS station 4R), and subaortic nodes (SAN) (ATS station 5). AA = ascending aorta, Ao = aorta, SVC = superior vena cava, Tr = trachea. (c) Diagram shows the hilar nodes (HN) (ATS station 10), interlobar nodes (ILN) (ATS station 11), lobar nodes (LN) (ATS station 12), and subcarinal nodes (SCN) (ATS station 7). Ao = aorta, BI = bronchus intermedius, LMB = left main bronchus, LPA = left pulmonary artery, LULB = left upper lobe bronchus, PA = pulmonary artery, RPA = right pulmonary artery, SPV = superior pulmonary vein, SVC = superior vena cava. (d) Diagram shows the left inferior pulmonary ligament node (LIPLN) (ATS station 9) and right inferior pulmonary ligament node (RIPLN) (ATS station 9). Ao = aorta, CS = coronary sinus, ECF = epicardial fat, LV = left ventricle, RA = right atrium, RV = right ventricle.