fig1

Figure 1. LN groups according to the location of the tumor. (A) LN groups for tumor located in cervical area; (B) LN groups for tumor located in upper thoracic area; (C) LN groups for tumor located in middle thoracic area; (D) LN groups for tumor located in lower thoracic area. This figure is adapted from Japan Esophageal Society. Esophagus. 2017;14:1-36. Springer Nature^[6] (https://doi.org/10.1007%2Fs10388-016-0551-7) under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/). LN: Lymph node.