Abstract
Objectives
To determine patients with de novo metastatic nasopharyngeal carcinoma (mNPC) who would benefit from receiving definitive radiation therapy (DRT) along with their pre-existing palliative chemotherapy (PCT) by evaluating their post-PCT Deauville scores and EBV DNA.
Methods
A total of 570 mNPC patients, treated with PCT or PCT+DRT, were studied. EBV DNA levels, along with post-PCT Deauville scores, were used to stratify risk based on the recursive partitioning analysis (RPA).
Results
Significant differences were observed in the survival rates of patients with Deauville scores of 1–3 and 4–5 (2-year progression-free survival (PFS): 23.4% versus 8.5%, p < 0.001; 2-year overall survival (OS): 56.8% versus 18.8%, p < 0.001). RPA yielded three distinct groups in the increasing order of risk (Deauville scores of all RPA I-II were within the range of 1–3): (1) RPA I: EBV DNA levels at a pretreatment concentration ≤ 4000 copies/mL and undetectable post-PCT; (2) RPA II: EBV DNA levels either at a pretreatment concentration > 4000 copies/mL or at a pretreatment concentration ≤ 4000 copies/mL and detectable post-PCT; (3) RPA III: Deauville scores 4–5. While patients in RPA I and RPA II had significantly PFS rates when treated with PCT+DRT than when treated with PCT alone (RPA I: 72.7% versus 13.4%, RPA II: 37.8% versus 6.3%), those in RPA III did not experience such PFS benefits (6.5% versus 9.7%).
Conclusion
PCT+DRT might improve the survival rates in mNPC patients in the low- and mid-risk strata but not those of patients in the high-risk strata.
Key Points
-
We use the Deauville scores and the concentrations of the Epstein-Barr virus (EBV) DNA to determine those patients with de novo metastatic NPC who would benefit from radiation therapy.
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Abbreviations
- 2-[18F]FDG:
-
2-deoxy-2-[18F]fluoro-D-glucose
- 5-fu:
-
5-Fluorouracil
- AJCC:
-
American Joint Committee on Cancer
- AUC:
-
Area under the receiver operating characteristic curve
- CCRT:
-
Concurrent chemoradiotherapy
- CI:
-
Confidence interval
- DDP:
-
Cisplatin
- DRT:
-
Definitive radiation therapy
- EBV DNA:
-
Epstein-Barr virus DNA
- ECOG:
-
Eastern Cooperative Oncology Group
- HR:
-
Hazard ratio
- IMRT:
-
Intensity-modulated radiotherapy
- mNPC:
-
Metastatic nasopharyngeal carcinoma
- MRI:
-
Magnetic resonance imaging
- NCCN:
-
National Comprehensive Cancer Network
- OS:
-
Overall survival
- PCT:
-
Palliative chemotherapy
- PET/CT:
-
Positron emission tomography/computed tomography
- PFS:
-
Progression-free survival
- ROC:
-
Receiver operator characteristic
- RPA:
-
Recursive partitioning analysis
- RT:
-
Radiation therapy
- SUV:
-
Standardized uptake value
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Funding
This study was funded by grants from the National Key R&D Program of China(2017YFC0908500, 2017YFC1309003), the National Natural Science Foundation ofChina (No. 81425018, No. 81672868, No.81802775, No. 82073003, No.82002852, No.82003267), the Sci-Tech Project Foundation of Guangzhou City (201707020039), theSun Yat-sen University Clinical Research 5010 Program (No. 2019023), the SpecialSupport Plan of Guangdong Province (No. 2014TX01R145), the Natural ScienceFoundation of Guangdong Province (No. 2017A030312003, No. 2018A0303131004), theNatural Science Foundation of Guangdong Province for Distinguished Young Scholar(No. 2018B030306001), the Sci-Tech Project Foundation of Guangdong Province (No.2014A020212103), the Health and Medical Collaborative Innovation Project ofGuangzhou City (No. 201400000001, No.201803040003), Pearl River S&T NovaProgram of Guangzhou (No. 201806010135), the Planned Science and TechnologyProject of Guangdong Province (2019B020230002), the National Science andTechnology Pillar Program during the Twelfth Five-year Plan Period (No.2014BAI09B10), Natural Science Foundation of Guangdong Province(2017A030312003), and the Fundamental Research Funds for the Central Universities.
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The scientific guarantor of this publication is Hai-Qiang Mai.
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The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
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Ying-Ying Hu and Ji-Bin Li kindly provided statistical advice for this manuscript.
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Written informed consent was obtained from all patients in this study.
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Institutional Review Board approval was obtained.
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• retrospective
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• performed at one institution
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Yang, ZC., Hu, YY., Liu, LT. et al. Determining the suitability of definitive radiation therapy in patients with metastatic nasopharyngeal carcinoma based on PET/CT: a large cohort study. Eur Radiol 32, 7722–7732 (2022). https://doi.org/10.1007/s00330-022-08814-3
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DOI: https://doi.org/10.1007/s00330-022-08814-3