诱导化疗联合放疗在早期结外NK/T细胞淋巴瘤的预后分析

目的 分析早期结外NK/T细胞淋巴瘤(ENKTCL)使用诱导化疗联合放疗的疗效及预后因素。方法 2003—2021年间贵州医科大学附属肿瘤医院收治287例早期ENKTCL患者,接受诱导化疗联合放疗的综合治疗,分析早期NKTCL的临床预后相关因素。Kaplan-Meier计算总生存(OS)、无进展生存(PFS)及log-rank法检验和单因素分析,Cox模型多因素分析。结果 全组5年OS、PFS分别为72.8%、68.9%;基于改良的Nomogram风险指数(NRI)预后模型分为低危组(0分)、中低危组(1分)、中高危组(2分)、高危组(3分)和极高危组(≥4分)的5年OS分别为95.6%、76.3%、69.5%、61.0%和23.3%(P<0.001),5年PFS分别为93,2%、69.8%、64.6%、60.2%和23.3%(P<0.001)。放疗剂量≥50Gy和<50Gy组5年OS分别为73.8%和65.9%(P=0.123),5年PFS分别为72.8%和45.3%(P=0.001)。诱导化疗近期疗效为CR、PR、SD、PD的5年OS分别为85.4%、74.0%、61.8%、28.5%(P<0.001),5年PFS分别为83.7%、66.8%、65.7%、27.4%(P<0.001)。单因素分析显示Ⅱ期、ECOG≥2分、超腔、放疗剂量<50Gy、诱导化疗近期疗效为5年OS及PFS的预后不良因素(均P<0.05),多因素分析显示超腔、ECOG≥2分、Ⅱ期为OS预后不良因素(均P<0.05),而超腔、ECOG≥2分为PFS的预后不良因素(均P<0.05)。结论 早期结外NK/T细胞淋巴瘤采用以诱导化疗联合足量放疗能取得较好疗效;对诱导化疗近期疗效能够达到完全缓解预后良好。

Prognostic analysis of early stage extranodal natural-killer/T cell lymphoma treated with induced chemotherapy combined with radiotherapy

Objective To analyze the efficacy and prognostic factors of induced chemotherapy combined with radiotherapy in the treatment of early stage extranodal natural-killer/T cell lymphoma (ENKTCL). Methods Two hundred and eighty-seven early stage NKTCL patients were treated in Affiliated Cancer Hospital of Guizhou Medical University from October 2003 to October 2021. All patients were aDministrated with short courses of induced chemotherapy combined with radiotherapy. Clinical prognostic factors of early stage NKTCL were analyzed. The overall survival (OS) and progression-free survival (PFS) were calculated by Kaplan-Meier method, log-rank test was conducted for univariate analysis and Cox models were performed for multivariate analysis. Results The 5-year OS and PFS were 72.8% and 68.9% in all patients. According to Nomogram risk index (NRI) prognostic model, 286 patients were divided into the low risk (NRI=0), intermediate low risk (NRI=1), intermediate high risk (NRI=2), high risk (NRI=3) and very high risk (NRI≥4) groups. In these 5 groups, the 5-year OS were 95.6%,76.3%,69.5%,61.0% and 23.3%(all P<0.001), and the 5-year PFS were 93,2%, 69.8%, 64.6%, 60.2% and 23.3%(all P<0.001), respectively. In the radiotherapy with a dose of ≥50Gy and<50Gy groups, the 5-year OS were 73.8% and 65.9%(P=0.123) and the 5-year PFS were 72.8% and 45.3%(P=0.001). According to the response to induced chemotherapy of complete response (CR), partial response (PR), stable disease (SD) and progressive disease (PD), the 5-year OS were 85.4%,74.0%,61.8% and 28.5%(all P<0.001), and the 5-year PFS were 83.7%,66.8%,65.7% and 27.4%(all P<0.001), respectively. Univariate analyses showed that stage Ⅱ, ECOG≥2, primary tumor invasion, radiotherapy dose<50Gy and short-term efficacy of induced chemotherapy were poor prognostic factors for the 5-year OS and PFS (all P<0.05). Multivariate analyses demonstrated that primary tumor invasion, ECOG≥2 and stage Ⅱ were poor prognostic factors for OS (all P<0.05), and primary tumor invasion and ECOG≥2 were poor prognostic factors for PFS (all P<0.05). Conclusions Early stage NKTCL patients can obtain high efficacy after induced chemotherapy combined with radiotherapy.complete response to induced chemotherapy is associated with favorable prognosis.