Introduction: Nasopharyngeal carcinomas are the most radiation-sensitive tumours, and radiotherapy alone provides better local control. Objectives: To evaluate the clinical efficacy and acute and late toxicities of tw...Introduction: Nasopharyngeal carcinomas are the most radiation-sensitive tumours, and radiotherapy alone provides better local control. Objectives: To evaluate the clinical efficacy and acute and late toxicities of two different treatment regimens for locally advanced nasopharyngeal carcinoma. Methods: From 2014 to 2017, 150 cases of stage III and 68 cases of stage IVA nasopharyngeal carcinoma were treated. Of these, 137 received conventional radiotherapy plus chemotherapy, and 81 received intensity-modulated radiotherapy plus chemotherapy. Chemotherapy was given either as induction, concurrent or adjuvant therapy. Survival rates were calculated according to Kaplan Meier and compared with the Log-rank test. The RTOG or EORTC criteria were used to assess acute and late toxicities. Results: The median follow-up time was 21.5 months, and the 2-year locoregional relapse-free survival, distant metastases-free survival, and overall survival rates in the conventional radiotherapy plus chemotherapy group were 76%, 71% and 77%, respectively;in the intensity-modulated radiotherapy plus chemotherapy group, they were 97%, 84%, and 100%, respectively. The difference in survival between the two groups was significant (χ<sup>2</sup> = 5.06, P = 0.028). The incidence of grade 2 and 3 xerostomia one year after radiotherapy was 45.1% and 30.9% versus 33.3% and 0%. Conclusion: Compared with conventional radiotherapy plus chemotherapy, intensity-modulated radiotherapy plus chemotherapy offers better locoregional relapse-free survival and overall survival in patients with stage III and IVA nasopharyngeal carcinoma, and may significantly reduce the occurrence of radiation-induced xerostomia.展开更多
文摘Introduction: Nasopharyngeal carcinomas are the most radiation-sensitive tumours, and radiotherapy alone provides better local control. Objectives: To evaluate the clinical efficacy and acute and late toxicities of two different treatment regimens for locally advanced nasopharyngeal carcinoma. Methods: From 2014 to 2017, 150 cases of stage III and 68 cases of stage IVA nasopharyngeal carcinoma were treated. Of these, 137 received conventional radiotherapy plus chemotherapy, and 81 received intensity-modulated radiotherapy plus chemotherapy. Chemotherapy was given either as induction, concurrent or adjuvant therapy. Survival rates were calculated according to Kaplan Meier and compared with the Log-rank test. The RTOG or EORTC criteria were used to assess acute and late toxicities. Results: The median follow-up time was 21.5 months, and the 2-year locoregional relapse-free survival, distant metastases-free survival, and overall survival rates in the conventional radiotherapy plus chemotherapy group were 76%, 71% and 77%, respectively;in the intensity-modulated radiotherapy plus chemotherapy group, they were 97%, 84%, and 100%, respectively. The difference in survival between the two groups was significant (χ<sup>2</sup> = 5.06, P = 0.028). The incidence of grade 2 and 3 xerostomia one year after radiotherapy was 45.1% and 30.9% versus 33.3% and 0%. Conclusion: Compared with conventional radiotherapy plus chemotherapy, intensity-modulated radiotherapy plus chemotherapy offers better locoregional relapse-free survival and overall survival in patients with stage III and IVA nasopharyngeal carcinoma, and may significantly reduce the occurrence of radiation-induced xerostomia.
文摘目的 探讨外周血循环肿瘤细胞(circulating tumor cells,CTCs)和EB病毒(EBV)-DNA对鼻咽癌患者根治性放化疗后复发转移的评估价值。方法 纳入2015年1月-2017年1月在广西壮族自治区桂东人民医院首次接受根治性放化疗鼻咽癌患者160例,利用抗体标记和流式细胞仪联合方法,分别检测患者治疗前后外周血CTCs数量和EBV-DNA拷贝数,且治疗后随访5年,对包括治疗前后CTCs和EBV-DNA在内的预后因子进行Cox单因素和多因素分析,绘制两者预测鼻咽癌患者根治性放化疗后复发转移的ROC曲线,进一步分析其预测效能,采用Kaplan-Meier法分别绘制CTCs阳性和CTCs阴性两组以及EBV-DNA阳性和EBV-DNA阴性两组患者生存曲线,探索CTCs及EBV-DNA与接受根治性放化疗鼻咽癌患者后复发转移的关系。结果 本研究所有患者经临床病理影像学评估美国癌症联合委员会(AJCC)分期为Ⅲ-Ⅳa期,接受根治性放化疗后随访5年。5年内复发转移患者74例,未复发转移患者86例,Cox单因素分析结果显示,年龄、T分级、N分级、AJCC分期、CTCs(治疗后)及EBV-DNA(治疗后)6个指标与鼻咽癌患者根治性放化疗后5年内复发转移可能相关(P<0.05),校正和控制混杂变量后AJCC分期、CTCs(治疗后)及EBV-DNA(治疗后)是影响鼻咽癌患者根治性放化疗后复发转移独立预测因素[HR(95%CI)=5.356(4.817-5.864)、2.425(2.117-2.835)、1.624(1.345-1.975)],CTCs及EBV-DNA预测鼻咽癌患者根治性放化疗后复发转移的曲线下面积(area under the curve,AUC)分别为[0.786(95%CI=0.735-0.855)]、[0.759(95%CI=0.721-0.841)],两者联合预测的AUC为[0.912(95%CI=0.875-0.945)]。Kaplan-Meier生存分析显示,治疗后CTCs阴性患者根治性放化疗后1年、3年、5年无病生存率分别为100%、92.4%、77.2%,明显高于治疗后CTCs阳性患者无病生存率,分别为78.5%、72.6%、48.5%,差异有统计学意义(χ2=6.789,P=0.009)。治疗后EBV-DNA阴性患者根治性放化疗后1年、3年、5年无病生存率分别为100%、81.5%、78.7%,明显高于治疗后EBV-DNA阳性患者无病生存率,分别为78.5%、52.3%、52.3%,差异有统计学意义(χ2=5.891,P=0.021)。结论 治疗后的CTCs和EBV-DNA可用于评估鼻咽癌患者根治性放疗后的复发转移风险。