Regional lymph node stations for staging esophageal cancer

(A-C) Lymph node maps for esophageal cancer. Regional lymph node stations for staging esophageal cancer from left (A), right (B), and anterior (C).
1R: Right lower cervical paratracheal nodes, between the supraclavicular paratracheal space and apex of the lung. 1L: Left lower cervical paratracheal nodes, between the supraclavicular paratracheal space and apex of the lung. 2R: Right upper paratracheal nodes, between the intersection of the caudal margin of the brachiocephalic artery with the trachea and the apex of the lung. 2L: Left upper paratracheal nodes, between the top of the aortic arch and the apex of the lung. 4R: Right lower paratracheal nodes, between the intersection of the caudal margin of the brachiocephalic artery with the trachea and cephalic border of the azygos vein. 4L: Left lower paratracheal nodes, between the top of the aortic arch and the carina. 7: Subcarinal nodes, caudal to the carina of the trachea. 8U: Upper thoracic paraesophageal lymph nodes, from the apex of the lung to the tracheal bifurcation. 8M: Middle thoracic paraesophageal lymph nodes, from the tracheal bifurcation to the caudal margin of the inferior pulmonary vein. 8Lo: Lower thoracic paraesophageal lymph nodes, from the caudal margin of the inferior pulmonary vein to the EGJ. 9R: Pulmonary ligament nodes, within the right inferior pulmonary ligament. 9L: Pulmonary ligament nodes, within the left inferior pulmonary ligament. 15: Diaphragmatic nodes, lying on the dome of the diaphragm and adjacent to or behind its crura. 16: Paracardial nodes, immediately adjacent to the gastroesophageal junction. 17: Left gastric nodes, along the course of the left gastric artery. 18: Common hepatic nodes, immediately on the proximal common hepatic artery. 19: Splenic nodes, immediately on the proximal splenic artery. 20: Celiac nodes, at the base of the celiac artery.