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Liu Y, Ma J, Zeng XY, Zuo ZC, Chen RZ, Li XY, Liang ZG, Chen KH, Pan XB, Pei S, Yu BB, Li L, Qu S, Yang YL, Zhu XD. Efficacy of metastatic lesion radiotherapy in patients with metastatic nasopharyngeal carcinoma: A multicenter retrospective study. Radiother Oncol 2024; 196:110311. [PMID: 38670263 DOI: 10.1016/j.radonc.2024.110311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 04/05/2024] [Accepted: 04/19/2024] [Indexed: 04/28/2024]
Abstract
OBJECTIVE We investigated the efficacy of metastatic lesion radiotherapy (MLRT) in patients with metastatic nasopharyngeal carcinoma (mNPC). MATERIALS AND METHODS Patients with mNPC from three institutions were included in this study. Propensity score matching (PSM) was employed to ensure comparability between patient groups. Overall survival (OS) rates were assessed using the Kaplan-Meier method and compared using the log-rank test. Prognostic factors were identified using univariate and multivariate Cox hazard analyses. Subgroup analyses were conducted to assess the effects of MLRT on specific patient populations. RESULTS We analyzed data from 1157 patients with mNPC. Patients who received MLRT had significantly better OS than those who did not, both in the original (28 vs. 21 months) and PSM cohorts (26 vs. 23 months). MLRT was identified as an independent favorable predictor of OS in multivariate analyses, with hazard ratios of 0.67. The subgroup analysis results indicated that radiotherapy effectively treated liver, lung, and bone metastatic lesions, particularly in patients with a limited tumor burden. Higher total radiation doses of MLRT (biologically effective dose (BED) ≥ 56 Gy) were associated with improved OS, while neither radiation technique nor dose fractionation independently influenced prognosis. CONCLUSIONS MLRT offers survival advantages to patients diagnosed with mNPC. Patients with limited metastatic burden derive the most benefit from MLRT, and the recommended regimen for MLRT is a minimum BED of 56 Gy for optimal outcomes.
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Affiliation(s)
- Yang Liu
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China
| | - Jie Ma
- Medical Imaging Department, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China
| | - Xiao-Yi Zeng
- Department of Radiation Oncology, Wuzhou Red Cross Hospital, Wuzhou, People's Republic of China
| | - Zhi-Chao Zuo
- Department of Radiology, Xiangtan Central Hospital, Xiangtan, People's Republic of China
| | - Rui-Zhong Chen
- Department of Radiation Oncology, Wuzhou Red Cross Hospital, Wuzhou, People's Republic of China
| | - Xiao-Yu Li
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China
| | - Zhong-Guo Liang
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China
| | - Kai-Hua Chen
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China
| | - Xin-Bin Pan
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China
| | - Su Pei
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China
| | - Bin-Bin Yu
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China
| | - Ling Li
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China; Key Laboratory of Early Prevention and Treatment for Regional High-Incidence-Tumor, Guangxi Medical University, Ministry of Education, Nanning, Guangxi, People's Republic of China
| | - Song Qu
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China; Key Laboratory of Early Prevention and Treatment for Regional High-Incidence-Tumor, Guangxi Medical University, Ministry of Education, Nanning, Guangxi, People's Republic of China
| | - Yun-Li Yang
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China.
| | - Xiao-Dong Zhu
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China; Key Laboratory of Early Prevention and Treatment for Regional High-Incidence-Tumor, Guangxi Medical University, Ministry of Education, Nanning, Guangxi, People's Republic of China; Department of Oncology, Affiliated Wu-Ming Hospital of Guangxi Medical University, Nanning, People's Republic of China.
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Liu Y, Zuo ZC, Zeng XY, Ma J, Ma CX, Chen RZ, Liang ZG, Chen KH, Li L, Qu S, Lu JY, Zhu XD. Establishing subdivisions of M1 stage nasopharyngeal carcinoma based on decision tree classification: A multicenter retrospective study. Oral Oncol 2024; 153:106834. [PMID: 38718458 DOI: 10.1016/j.oraloncology.2024.106834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Revised: 04/09/2024] [Accepted: 05/03/2024] [Indexed: 05/21/2024]
Abstract
OBJECTIVES To meet the demand for personalized treatment, effective stratification of patients with metastatic nasopharyngeal carcinoma (mNPC) is essential. Hence, our study aimed to establish an M1 subdivision for prognostic prediction and treatment planning in patients with mNPC. MATERIALS AND METHODS This study included 1239 patients with mNPC from three medical centers divided into the synchronous mNPC cohort (smNPC, n = 556) to establish an M1 stage subdivision and the metachronous mNPC cohort (mmNPC, n = 683) to validate this subdivision. The primary endpoint was overall survival. Univariate and multivariate Cox analyses identified covariates for the decision-tree model, proposing an M1 subdivision. Model performance was evaluated using time-dependent receiver operating characteristic curves, Harrell's concordance index, calibration plots, and decision curve analyses. RESULTS The proposed M1 subdivisions were M1a (≤5 metastatic lesions), M1b (>5 metastatic lesions + absent liver metastases), and M1c (>5 metastatic lesions + existing liver metastases) with median OS of 34, 22, and 13 months, respectively (p < 0.001). This M1 subdivision demonstrated superior discrimination (C-index = 0.698; 3-year AUC = 0.707) and clinical utility over those of existing staging systems. Calibration curves exhibited satisfactory agreement between predictions and actual observations. Internal and mmNPC cohort validation confirmed the robustness. Survival benefits from local metastatic treatment were observed in M1a, while immunotherapy improved survival in patients with M1b and M1c disease. CONCLUSION This novel M1 staging strategy provides a refined approach for prognostic prediction and treatment planning in patients with mNPC, emphasizing the potential benefits of local and immunotherapeutic interventions based on individualized risk stratification.
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Affiliation(s)
- Yang Liu
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China
| | - Zhi-Chao Zuo
- Department of Radiology, Xiangtan Central Hospital, Xiangtan, People's Republic of China
| | - Xiao-Yi Zeng
- Department of Radiation Oncology, Wuzhou Red Cross Hospital, Wuzhou, People's Republic of China
| | - Jie Ma
- Medical Imaging Department, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China
| | - Cheng-Xian Ma
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China
| | - Rui-Zhong Chen
- Department of Radiation Oncology, Wuzhou Red Cross Hospital, Wuzhou, People's Republic of China
| | - Zhong-Guo Liang
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China
| | - Kai-Hua Chen
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China
| | - Ling Li
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China; Key Laboratory of Early Prevention and Treatment for Regional High-Incidence-Tumor, Guangxi Medical University, Ministry of Education, Nanning, Guangxi, People's Republic of China
| | - Song Qu
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China; Key Laboratory of Early Prevention and Treatment for Regional High-Incidence-Tumor, Guangxi Medical University, Ministry of Education, Nanning, Guangxi, People's Republic of China
| | - Jie-Yan Lu
- Medical Imaging Department, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China
| | - Xiao-Dong Zhu
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, People's Republic of China; Key Laboratory of Early Prevention and Treatment for Regional High-Incidence-Tumor, Guangxi Medical University, Ministry of Education, Nanning, Guangxi, People's Republic of China; Department of Oncology, Affiliated Wu-Ming Hospital of Guangxi Medical University, Nanning, People's Republic of China.
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Zou X, Feng ZK, Hua YJ, Liu YP, Xie YL, Ouyang YF, Liu YL, Wang ZQ, You R, Ding X, Yang Q, Yu ZK, Huang PY, Wang SL, Chen MY. A novel endoscopic nasopharyngectomy by low-temperature plasma radiofrequency ablation in localized recurrent nasopharyngeal carcinoma. Head Neck 2024; 46:291-299. [PMID: 37974339 DOI: 10.1002/hed.27579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 09/18/2023] [Accepted: 11/02/2023] [Indexed: 11/19/2023] Open
Abstract
OBJECTIVE Endoscopic nasopharyngectomy (ENPG) with en bloc resection has been well accepted in resectable localized recurrent nasopharyngeal carcinoma (rNPC), but it is a difficult technique to master for most otorhinolaryngology head and neck surgeons. Ablation surgery is a new and simplified method to remove tumors. We designed a novel method using low-temperature plasma radiofrequency ablation (LPRA) and evaluated the survival benefit. METHODS A total of 56 localized rNPC patients were explained in detail and retrospectively analyzed. The surgery method was ablated from the resection margin to the center of the tumor. The postmetastatic overall survival (OS), local relapse-free survival (LRFS) rate, progression-free survival (PFS) and distant metastasis-free survival (DMFS) were analyzed using the Kaplan-Meier method and compared by the log-rank test. RESULTS All surgeries were successfully performed without any severe postoperative complications or deaths. The median operation time of ablation and harvested NSFF respectively were 29 min (range, 15-100 min) and 101 min (range, 30-180 min). The average number of hospital days postoperation was 3 days (range, 2-5 days). All cases (100.0%) had radical ablation with negative resection margins. The nasopharyngeal defects were completely re-epithelialized in 54 (96.4%) patients. As of the data cutoff (September 3, 2023), the median follow-up time was 44.3 months (range, 17.1-52.7 months, 95% CI: 40.4-48.2). The 3-year OS, LRFS, PFS and DMFS of the entire cohort were 92.9% (95% CI: 0.862-0.996), 89.3% (95% CI: 0.813-0.973), 87.5% (95% CI: 0.789-0.961), and 92.9% (95% CI: 0.862-0.996), respectively. Cycles of radiotherapy were independent risk factors for OS (p = 0.003; HR, 32.041; 95% CI: 3.365-305.064), LRFS (p = 0.002; HR, 10.762; 95% CI: 2.440-47.459), PFS (p = 0.004; HR, 7.457; 95% CI: 1.925-28.877), and DMFS (p = 0.002; HR, 34.776; 95% CI: 3.806-317.799). CONCLUSION Radical endoscopic nasopharyngectomy by using low-temperature plasma radiofrequency ablation is a novel, safe and simplified method to master and disseminate for treating resectable rNPC. However, further data and longer follow-up time are needed to prove its efficacy.
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Affiliation(s)
- Xiong Zou
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Cooperative Surgical Ward of Nasopharyngeal Carcinoma, Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Zheng-Kai Feng
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
| | - Yi-Jun Hua
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
| | - You-Ping Liu
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
| | - Yu-Long Xie
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
| | - Yan-Feng Ouyang
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
| | - Yong-Long Liu
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
| | - Zhi-Qiang Wang
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
| | - Rui You
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
| | - Xi Ding
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
| | - Qi Yang
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
| | - Zi-Kun Yu
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
| | - Pei-Yu Huang
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
| | - Shun-Lan Wang
- Department of Otorhinolaryngology, First Hospital Affiliated to Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
| | - Ming-Yuan Chen
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
- Cooperative Surgical Ward of Nasopharyngeal Carcinoma, Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
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Yang J, Liao W, Su S, Zeng N, Zhang S, He J, Chen N. Long-term outcomes of metastasis-directed stereotactic body radiation therapy in metastatic nasopharyngeal carcinoma. Cancer Med 2023; 13:e6764. [PMID: 38148586 PMCID: PMC10807683 DOI: 10.1002/cam4.6764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 10/22/2023] [Accepted: 11/13/2023] [Indexed: 12/28/2023] Open
Abstract
BACKGROUND The study aims to evaluate the outcomes of metastasis-directed stereotactic body radiation therapy (SBRT) in metastatic nasopharyngeal carcinoma (mNPC). METHODS We reviewed all SBRT conducted in patients with mNPC in our institution between 2013 and 2022. Systemic therapy was performed with chemotherapy with or without anti-programmed death-1 (PD-1) therapy. Local treatment delivered with ablative purpose in stereotactic setting with dose/fraction ≥5 Gy was evaluated. Kaplan-Meier analyses were used to determine the rates of local control (LC), progression-free survival (PFS), and overall survival (OS). Univariate and multivariate analyses were performed by Cox regression. RESULTS A total of 54 patients with 76 metastatic sites receiving SBRT were analyzed. Median follow-up was 49 months. The 3-year LC, PFS, and OS rates were 89.1%, 29.4%, and 57.9%, respectively. Adding a PD-1 inhibitor to SBRT tended to prolong median OS (50.1 vs. 32.2 months, p = 0.068). Patients receiving a biological effective dose (BED, α/β = 10) ≥ 80 Gy had a significantly longer median OS compared to those who received a lower dose (not reached vs. 29.5 months, p = 0.004). Patients with oligometastases (1-5 metastases) had a better median OS (not reached vs. 29.5 months, p < 0.001) and PFS (34.3 vs. 4.6 months, p < 0.001). Pretreatment EBV-DNA and maintenance therapy were also significant predictors for OS. CONCLUSIONS Metastatic NPC patients could benefit from metastases-directed SBRT in combination with systemic therapy.
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Affiliation(s)
- Jiangping Yang
- Department of Head and Neck Oncology and Department of Radiation Oncology, Cancer Center and State Key Laboratory of Biotherapy, West China HospitalSichuan UniversityChengduChina
| | - Wenjun Liao
- Department of Radiation Oncology, Radiation Oncology Key Laboratory of Sichuan ProvinceSichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of ChinaChengduChina
| | - Shitong Su
- Department of Head and Neck Oncology and Department of Radiation Oncology, Cancer Center and State Key Laboratory of Biotherapy, West China HospitalSichuan UniversityChengduChina
| | - Ni Zeng
- Department of Head and Neck Oncology and Department of Radiation Oncology, Cancer Center and State Key Laboratory of Biotherapy, West China HospitalSichuan UniversityChengduChina
| | - Shichuan Zhang
- Department of Radiation Oncology, Radiation Oncology Key Laboratory of Sichuan ProvinceSichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of ChinaChengduChina
| | - Jinlan He
- Department of Head and Neck Oncology and Department of Radiation Oncology, Cancer Center and State Key Laboratory of Biotherapy, West China HospitalSichuan UniversityChengduChina
| | - Nianyong Chen
- Department of Head and Neck Oncology and Department of Radiation Oncology, Cancer Center and State Key Laboratory of Biotherapy, West China HospitalSichuan UniversityChengduChina
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Luo D, Li J, Guo W, Guo C, Meng X, Xie P, Lin J, Mo H, Zhang Q, Chen Y, Shen G. The map of bone metastasis in nasopharyngeal carcinoma: A real-world study. Cancer Med 2023; 12:17660-17670. [PMID: 37563937 PMCID: PMC10523956 DOI: 10.1002/cam4.6383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 06/07/2023] [Accepted: 07/19/2023] [Indexed: 08/12/2023] Open
Abstract
OBJECTIVES The aim of this study was to compare the metastatic patterns of synchronous bone metastasis (SBM) and metachronous bone metastasis (MBM) in nasopharyngeal carcinoma (NPC). METHODS This study included bone metastases in NPC patients from 2005 to 2016 in a Chinese hospital. Cohort 1 was collected from 2005 to 2010 for discovery, and Cohort 2 from 2011 to 2016 for validation. The chi-squared test, Wilcoxon rank sum test, and Kaplan-Meier technique were used to compare site, time, and survival between cohorts 1 and 2. Prognostic factors were analyzed using univariate or multivariate Cox regression. RESULTS Cohort 1 had 112 individuals with SBM and 394 with MBM, and cohort 2 had 328 with SBM and 307 with MBM. The thoracic vertebra was the most frequently affected site of metastasis. Patients with SBM more often had metastasis to the cervical vertebrae compared with patients with MBM (34.5% vs. 22.3%, p < 0.05). Patients with SBM had better overall survival (42.2 months, 95% CI: 33.9-50.7) than patients with MBM (24.9 months, 95% CI: 22.2-28.7). Age at bone metastasis detection, metastasis to other organs, and more bone metastasis locations were associated with worse prognosis. The majority of MBMs occurred at 7 to 18 months after NPC diagnosis. CONCLUSION Radiotherapy does not modify the metastatic patterns of NPC bone metastases. Patients with SBM tend to have metastasis to the cervical vertebra, which is close to the nasopharynx. Paying more attention to bone metastases during follow-up in the first 2 years after an NPC diagnosis.
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Affiliation(s)
- Dong‐Hua Luo
- Department of Nasopharyngeal CarcinomaSun Yat‐sen University Cancer CenterGuangzhouGuangdongPR China
| | - Jia‐Xin Li
- Department of Radiation OncologyThe First Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouGuangdongPR China
| | - Wan‐Ping Guo
- Department of Nasopharyngeal CarcinomaSun Yat‐sen University Cancer CenterGuangzhouGuangdongPR China
| | - Chen‐Guang Guo
- Department of OncologyThe First Affiliated Hospital of Guangdong Pharmaceutical University, Guangdong Pharmaceutical UniversityGuangzhouGuangdongPR China
| | - Xiao‐Han Meng
- Department of Nasopharyngeal CarcinomaSun Yat‐sen University Cancer CenterGuangzhouGuangdongPR China
| | - Pei‐Jun Xie
- Department of Nasopharyngeal CarcinomaSun Yat‐sen University Cancer CenterGuangzhouGuangdongPR China
| | - Jie‐Yi Lin
- Department of Nasopharyngeal CarcinomaSun Yat‐sen University Cancer CenterGuangzhouGuangdongPR China
| | - Hao‐Yuan Mo
- Department of Nasopharyngeal CarcinomaSun Yat‐sen University Cancer CenterGuangzhouGuangdongPR China
| | - Qun Zhang
- Department of Radiation OncologyThe First Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouGuangdongPR China
| | - Yong Chen
- Department of Radiation OncologyThe First Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouGuangdongPR China
| | - Guo‐Ping Shen
- Department of Radiation OncologyThe First Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouGuangdongPR China
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