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Adjuvant chemotherapy following combined induction chemotherapy and concurrent chemoradiotherapy improves survival in N2–3-positive nasopharyngeal carcinoma patients

  • Original Article – Clinical Oncology
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Abstract

Objective

This study aimed to explore the clinical value of adjuvant chemotherapy (ACT) following concurrent chemo-radiotherapy (CCRT) and induction chemotherapy (ICT) in loco-regionally advanced nasopharyngeal carcinoma (LANC).

Methods

We included 839 newly diagnosed LANC patients in this study. ICT plus CCRT (ICT + CCRT group) was administered to 443 patients, and 396 patients received ACT after ICT plus CCRT (ICT + CCRT + ACT group). Univariate and multivariate Cox regression analyses were carried out. Furthermore, propensity score matching (PSM) was applied to balance the study and control groups.

Results

A total of 373 pairs of LANC patients were obtained after PSM analysis. We found that ACT following ICT + CCRT has no significant effect on improving the survival of LANC patients. By further exploring the ICT + CCRT + ACT treatment protocol, we excluded N0–1-positive patients and re-performed PSM in the ICT + CCRT and ICT + CCRT + ACT groups. Each group consisted of 237 patients. Kaplan–Meier analysis revealed that there were differences between the ICT + CCRT and ICT + CCRT + ACT groups in terms of the 5-year overall survival (OS) (78.9% vs. 85.0%, P = 0.034), disease-free survival (DFS) (73.4% vs. 81.7%, P = 0.029), and distant metastasis-free survival (DMFS) (84.9% vs. 76.0%, P = 0.019). In addition, the ICT + CCRT + ACT group had a higher incidence of grade 3/4 acute leukocytopenia/neutropenia.

Conclusion

Compared with ICT + CCRT, ACT following ICT plus CCRT can reduce distant metastasis of N2–3-positive LANC and improve the OS and DFS. The results demonstrated the feasibility and clinical utility of ACT following ICT plus CCRT.

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Funding

No external funding was provided to support the writing of this article.

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Authors and Affiliations

Authors

Contributions

R-HZ, Y-WY and H-YT conceived the study. HL, C-XH, RL, FH and H-YT collected all clinical data. H-YT and RL performed the statistical analyses. H-YT and K-PD prepared and edited the manuscript. All authors read and approved the final manuscript. Fang He has made contributions to the English language revision of this paper and put forward valuable modification comments.

Corresponding authors

Correspondence to Ya-Wei Yuan or Rong-Hui Zheng.

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Conflict of interest

The authors declare they have no competing interests.

Ethics approval

This retrospective study was approved by the Institutional Review Board (IRB) of the Affiliated Cancer Hospital & Institute of Guangzhou Medical University. Patients were required to provide written informed consent before enrolling in the study.

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Tao, HY., Liu, H., He, F. et al. Adjuvant chemotherapy following combined induction chemotherapy and concurrent chemoradiotherapy improves survival in N2–3-positive nasopharyngeal carcinoma patients. J Cancer Res Clin Oncol 148, 2959–2969 (2022). https://doi.org/10.1007/s00432-021-03846-6

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  • DOI: https://doi.org/10.1007/s00432-021-03846-6

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