Abstract
Objective
The purpose of this study was to compare the clinical outcomes and toxicities between induction chemotherapy (IC) + chemo-radiotherapy (CRT) and CRT alone in patients with locally advanced esophageal squamous cell carcinoma (ESCC), to explore the appropriate thoracic radiotherapy (TRT) timing after IC and to identify prognostic factors.
Methods
450 ESCC patients were included from September 2011 to December 2020, 238 of whom received IC/CRT. Propensity score matching was performed to balance potential confounders between the two groups. Multivariate Cox regression analysis was used to identify the independent prognostic factors.
Results
Patients who received IC/CRT experienced improved overall survival (OS) (38.5 vs. 28.8 months) and progression-free survival (PFS) (41.0 vs. 22.0 months) before matching, with similar results after matching. In the IC/CRT group, early TRT had more favorable survival than late TRT both matching before and after. In subgroup analysis, early TRT combination concurrent chemotherapy had better OS and PFS than late TRT combination concurrent chemotherapy. In addition, early TRT had better survival benefits regardless of the N stage. Notably, the IC/CRT group and early TRT group had manageable toxicities reaction compared with CRT alone group and the late TRT group. The nomogram was developed to predict the OS and PFS based on multivariate analysis results. The C-index was 0.743 and 0.722, respectively.
Conclusion
IC/CRT and early TRT could yield satisfactory clinical outcomes and controllable toxicities in locally advanced ESCC. The IC plus early concurrent CRT might be a promising treatment strategy for improving further survival in ESCC.
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Availability of data and materials
The datasets generated and analyzed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- EC:
-
Esophageal cancer
- EAC:
-
Esophageal adenocarcinoma
- ESCC:
-
Esophageal squamous cell carcinoma
- dCRT:
-
Definitively chemoradiotherapy
- OS:
-
Overall survival
- IC/CRT:
-
Induction chemotherapy before chemoradiotherapy
- CRT:
-
Chemoradiotherapy
- TRT:
-
Thoracic radiotherapy
- EUS:
-
Endoscopic ultrasonography
- CT:
-
Computed tomography
- PET/CT:
-
Positron emission tomography
- TNM:
-
Tumor node metastasis
- GTV:
-
Gross tumor volume
- CTV:
-
Clinical tumor volume
- PTV:
-
Planning tumor volume
- CFRT:
-
Convention fractionate radiotherapy
- PFS:
-
Progression-free survival
- PSM:
-
Propensity score matching
- BMI:
-
Body mass index
- CCRT:
-
Concurrent chemoradiotherapy
- T:
-
Tumor
- N:
-
Nodes
- IPTW:
-
The inverse probability of treatment weighting
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Acknowledgements
In the protocol design, data collection and analysis, and manuscript writing, we received strong support from clinical and technical colleagues. Their support and helps should be appreciated.
Funding
This work was supported by the National Clinical Key Specialty Construction Program, Fujian provincial Clinical Research Center for Cancer Radiotherapy and Immunotherapy (2020Y2012), and Fujian Science and Technology Innovation Joint Fund Project (2018Y9063).
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JCL, JHL and JJQ designed this study. JJQ, HCL, DMK, YLY, HL, HYZ, LYL, and QHZ contributed to data collection. MQL, JY, MYZ, and ZPW analyzed the data. JCL and JHL supervised the study. JJQ, HCL, YHW, and TXL wrote the manuscript. All authors read and approved the final manuscript.
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This study was approved by the ethics committee of Fujian Medical University Cancer Hospital and conducted following the declaration of Helsinki principles and its amendment. All authors read the final manuscript and approved it for publication.
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Qiu, J., Lin, H., Yu, Y. et al. Clinical outcomes and toxicities of locally advanced esophageal squamous cell carcinoma patients treated with early thoracic radiation therapy after induction chemotherapy. Int J Clin Oncol 28, 550–564 (2023). https://doi.org/10.1007/s10147-023-02299-w
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DOI: https://doi.org/10.1007/s10147-023-02299-w