Abstract Objectives The International Association for the Study of Lung Cancer Staging and Prognostic Factors Committee-Thymic Domain conducted a web-based cross-sectional survey to assess the acceptance of the TNM thymic staging system in the thoracic community. Methods A 50-item, web-based questionnaire was circulated among the members of the major thymic organizations worldwide from September to December 2018. The survey consisted of six sections (general information; overall perception of the TNM system; pretreatment staging; T category; N category; and perioperative treatments). Results In total, 217 responses were collected from 37 countries in four continents. The TNM classification was considered useful by 78% of the responders (N = 169); the Masaoka-Koga staging system was being used by 87% of the responders (N = 189). With regard to the T category, most responders (mostly surgeons) felt that the capsular and mediastinal pleural involvements should be considered separate T categories. As for the N category, 48% of the responders (N = 105) used the International Thymic Malignancies Interest Group/International Association for the Study of Lung Cancer thymic nodal map, and lymph node dissection (N1/N2) was performed for 50%/21% thymomas and 66%/41% thymic carcinomas. While analyzing the results by the three continents (Europe, Asia, and Americas), responders in Asia were found to report the largest use of the TNM system, the greatest attention to the N category, and the best participation in international thymic databases. Conclusions The survey indicates that the Union for International Cancer Control/American Joint Committee on Cancer TNM stage classification of thymic tumors is gaining acceptance among the scientific community. The present results will guide the work of the Staging and Prognostic Factors Committee-Thymic Domain for the revision of the ninth edition of the TNM stage classification of thymic tumors.

中文翻译：

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IASLC 胸腺肿瘤分期项目。UICC/AJCC 第 8 版胸腺肿瘤 TNM 分期分类的影响：调查结果

摘要 目的 国际肺癌分期和预后因素研究委员会胸腺领域进行了一项基于网络的横断面调查，以评估胸腺社区对 TNM 胸腺分期系统的接受程度。方法 2018 年 9 月至 12 月，在全球主要胸腺组织成员中分发了 50 项基于网络的问卷。调查包括六个部分（一般信息；TNM 系统的总体看法；预处理分期；T 类别； N 类；和围手术期治疗）。结果 总共收集了来自四大洲 37 个国家的 217 份回复。78% 的应答者 (N = 169) 认为 TNM 分类有用；87% 的应答者（N = 189）正在使用 Masaoka-Koga 分期系统。关于 T 类别，大多数反应者（主要是外科医生）认为包膜和纵隔胸膜受累应被视为单独的 T 类别。对于 N 类，48% 的应答者（N = 105）使用了国际胸腺恶性肿瘤兴趣小组/国际肺癌研究协会胸腺淋巴结图，50% 进行了淋巴结清扫（N1/N2） /21% 胸腺瘤和 66%/41% 胸腺癌。在分析三大洲（欧洲、亚洲和美洲）的结果时，发现亚洲的响应者报告了 TNM 系统的最大使用量、对 N 类别的最大关注以及对国际胸腺数据库的最佳参与。结论 调查表明，国际癌症控制联盟/美国癌症联合委员会胸腺肿瘤 TNM 分期分类正在获得科学界的认可。目前的结果将指导分期和预后因素委员会-胸腺领域的工作，以修订第九版胸腺肿瘤 TNM 分期分类。