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\n[https://doi.org/10.1007/s10388-024-01054-y](https://doi.org/10.1007/s10388-024-01054-y)  \nJapanese Classification of Esophageal Cancer, 12th Edition: Part I  \nShinji Mine1 · Koji Tanaka2 · Hiroshi Kawachi3 · Yasuhiro Shirakawa4 · Yuko Kitagawa5 · Yasushi Toh6 ·  \nTakushi Yasuda7 · Masayuki Watanabe8 · Takashi Kamei9 · Tsuneo Oyama10 · Yasuyuki Seto11 · Kentaro Murakami12 · Tomio Arai13 · Manabu Muto14 · Yuichiro Doki2  \nReceived: 6 September 2023 / Accepted: 23 February 2024 / Published online: 3 April 2024 © The Author(s) 2024  \nAbstract  \nThis is the first half of English edition of Japanese Classification of Esophageal Cancer, 12th Edition that was published by the Japan Esophageal Society in 2022.  \nKeywords Esophageal cancer · Japanese classification · Endoscopic treatment · Surgery · Chemotherapy · Radiotherapy  \nContents  \nPreface  \nGeneral principles of the 12th edition  \nAbbrevi ation  \nTerminology of the lymph nodes  \nGeneral rules  \nGeneral rules  \n1. Purpose, object, and methods of descriptions  \n* Shinji Mine[s.mine.gv@juntendo.ac.jp](s.mine.gv@juntendo.ac.jp)  \n1 Department of Esophageal and Gastroenterological Surgery, Juntendo University Hospital, 3‑1‑3, Hongo, Bunkyo‑Ku, Tokyo, Japan  \n2 Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan  \n3 Division of Pathology, Cancer Institute, Japanese Foundation for Cancer Research, Tokyo, Japan  \n4 Department of Surgery, Hiroshima City Hiroshima Citizens Hospital, Hiroshima, Japan  \n5 Department of Surgery, Keio University School of Medicine, Tokyo, Japan  \n6 Department of Gastroenterological Surgery, National Hospital Organization Kyushu Cancer Center, Fukuoka, Japan  \n7 Department of Surgery, Faculty of Medicine, Kindai University, Osaka, Japan  \n1.1. Purpose  \n1.2. Object  \n1.3. Methods of descriptions  \n1.3.1. Principles of descriptions and abbreviations  \n2. Description of primary tumor  \n2.1. Number of primary tumors, size, and circum‑ ferential location  \n2.2. Tumor location  \n2.2.1. Anatomical definition of esophagus  \n2.2.2. Anatomical subsites of esophagus  \n2.2.3. Principles of description of tumor location  \n8 Department of Gastroenterological Surgery, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan  \n9 Department of Surgery, Tohoku University Graduate School of Medicine, Miyagi, Japan  \n10 Department of Endoscopy, Saku Central Hospital Advanced Care Center, Nagano, Japan  \n11 Department of Gastrointestinal Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan  \n12 Department of Frontier Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan  \n13 Department of Pathology, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo, Japan  \n14 Department of Clinical Oncology, Kyoto University Hospital, Kyoto, Japan  \n2.3. Macroscopic tumor type  \n2.3.1. Principles of macroscopic tumor type  \n2.3.2. Macroscopic tumor type  \n2.3.3. Subclassification of superficial type (type 0)  \n2.4. Depth of tumor invasion (T)  \n2.4.1. Classification of depth of tumor invasion (T)  \n2.4.2. Diagnostic criteria for depth of superficial esophageal cancer by magnifying endoscopy  \n2.4.3. Diagnosis of cT4 invasion of adjacent organs by CT and other imaging techniques  \n2.4.3.1. Typical CT images: cT3r  \n2.4.3.2. Typical CT images: cT3br  \n2.4.3.3. Typical CT images: cT4  \n2.5. Infiltrative growth pattern (INF)  \n2.6. Lymphatic or venous invasion  \n2.6.1. Lymphatic invasion (Ly)  \n2.6.2. Venous invasion (V)  \n2.7. Description of surgical findings  \n2.7.1. Tumor size  \n2.7.2. Distance from surgical margin to the tumor  \n2.7.3. Surgical tumor type  \n2.7.4. Surgical margin  \n2.7.4.1. Proximal margin (PM)  \n2.7.4.2. Distal margin (DM)  \n2.7.4.3. Radial margin (RM)  \n2.8. Description of endoscopic findings  \n2.8.1. Number of tumors and resected specimens  \n2.8.2. Size of resected specimen and size of each tumor lesion  \n2.8.3. Tu","cbCaia6OrItSRxA7","https://ap.wps.com/l/cbCaia6OrItSRxA7","pdf",6441115,37,"English","# Preface\n## General principles of the 12th edition\n## Abbreviations and terminology of lymph nodes\n## General rules\n## Purpose, object, and methods of descriptions\n## Description of primary tumor\n## Description of lymph nodes\n## Distant organ and lymph node metastasis (M)\n## Stage\n## Handling of resected specimen","[{\"question\":\"What does Part I of the English edition focus on?\",\"answer\":\"It presents the first half of the 12th edition, emphasizing general principles and the core rules for describing esophageal cancer.\"},{\"question\":\"Which topics are included in the general rules section?\",\"answer\":\"The document outlines the purpose, object, and methods of descriptions, terminology of lymph nodes, and general rules for describing tumors.\"},{\"question\":\"What kinds of information are covered for primary tumors and staging?\",\"answer\":\"Primary tumor description includes tumor location, macroscopic tumor type, invasion depth (T), growth pattern (INF), and invasion, while staging addresses cervical/thoracic staging and lymph node dissection details.\"}]","Japanese Classification of Esophageal Cancer, 12th Edition - Part 1 - Overview & Key Principles | PDF",1790002650,93]