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Preoperative induction therapy for locally advanced thymic tumors: a retrospective analysis using the ChART database
Yucheng Wei1, Zhitao Gu1, Yi Shen1
11 Department of Thoracic Surgery, Affiliated Hospital of Qingdao University, Qingdao 266001, China ; 2 Department of Thoracic Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, China ; 3 Department of Thoracic Surgery, Guangdong Esophageal Cancer Institute, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou 510060, China ; 4 Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China ; 5 Department of Endocrinology, Tianjin Medical University General Hospital, Tianjin 300052, China ; 6 Department of Thoracic Surgery, Sichuan Cancer Hospital, Chengdu 610041, China ; 7 Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, China ; 8 Department of Thoracic Surgery, First Affiliated Hospital of Anhui Medical University, Hefei 230022, China ; 9 Department of Thoracic Surgery, Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou 450008, China ; 10 Department of Thoracic Surgery, Beijing Cancer Hospital, Beijing 100142, China ; 11 Department of Cardiothoracic Surgery, Changhai Hospital, Shanghai 200433, China ; 12 Department of Thoracic Surgery, Liaoning Cancer Hospital, Shenyang 110042, China ; 13 Department of Thoracic Surgery, First Affiliated Hospital of Jilin University, Changchun 130021, China ; 14 Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China ; 15 Department of Thoracic Surgery, Huashan Hospital, Fudan University, Shanghai 200032, China ; 16 Department of Esophageal Cancer, Tianjin Cancer Hospital, Tianjin 300060, China ; 17 Department of Thoracic Surgery, Zhejiang Cancer Hospital, Hangzhou 310022, China ; 18 Department of Thoracic Surgery, Jiangxi People's Hospital, Nanchang 330006, China.
Preoperative induction therapy for advanced thymic malignancies is rarely used but can benefit patients, especially thymoma cases, by downstaging tumors. Effective induction therapy improves survival for patients with initially unresectable thymic cancers.
Area of Science:
- Thoracic oncology
- Surgical oncology
- Neoadjuvant therapy research
Background:
- Locally advanced thymic malignancies pose treatment challenges.
- Evaluating the impact of preoperative induction therapy on patient prognosis is crucial.
Purpose of the Study:
- To assess the role of preoperative induction therapy in improving outcomes for locally advanced thymic malignancies.
- To compare the prognosis of patients receiving induction therapy versus direct surgery.
Main Methods:
- Retrospective analysis of patients from the Chinese Alliance for Research in Thymomas (ChART) database (1994-2012).
- Comparison between patients receiving induction therapy (IT group) and those undergoing direct surgery (DS group).
- Subgroup analysis excluding stage IV patients to focus on stages I-III.
Main Results:
- Induction therapy was used in only 4% of patients, with a 67.6% R0 resection rate.
- Tumor downstaging occurred in 25% of patients receiving induction therapy, more frequently in thymomas than thymic carcinomas.
- Downstaged tumors showed significantly higher 5-year overall survival (OS) compared to non-downstaged tumors (93.8% vs. 35.6%).
- In subgroup analysis (stages I-III), the direct surgery group had better 5-year OS (85.2%) than the induction therapy group (68.1%), but downstaged tumors in the IT group achieved similar survival to the DS group (93.8% vs. 85.2%).
Conclusions:
- Preoperative neoadjuvant therapy is infrequently used for advanced thymic malignancies.
- Effective induction therapy can downstage tumors, potentially benefiting patients with initially unresectable disease, particularly those with thymomas.
- Tumor downstaging after induction therapy is a key factor for improved survival in advanced thymic malignancies.
