582例鼻咽癌调强放疗5年远期疗效及预后分析

目的 评价本院鼻咽癌调强放疗(IMRT)的远期疗效和预后因素。方法 回顾分析2001 -2004年进行IMRT的582例初治鼻咽癌患者的临床结果,其中Ⅰ、Ⅱ、Ⅲ、Ⅳa期分别为36、144、224、178例。所有患者鼻咽和上颈部靶区均采用NOMOS的IMRT技术。运用美国放疗肿瘤组织标准评价急慢性不良反应,Kaplan-Meier法进行生存率分析,多因素预后分析采用Cox回归模型。结果 随访率为93.5％。5年局部控制率、区域控制率、无远处转移生存率、无瘤生存率、疾病特异生存率和总生存率分别为89.8％、95.2％、74.1％、69.6％、83.2％和77.1％。局部复发29例,区域复发13例,远处转移117例。3级急性和慢性不良反应分别为44.5％(唾液腺、口腔黏膜和皮肤)和4.2％。多因素分析表明影响总生存率的独立预后因素为临床分期、N分期、放疗中断时间、治疗前血红蛋白含量、体重降低幅度和化疗。结论 IMRT鼻咽癌获得了较好的远期疗效和生存质量;临床分期和N分期是影响总生存率的预后因素;远处转移是治疗失败的主要因素;急慢性不良反应主要为1～2级。

Long-term results and prognostic factors in 582 nasopharyngeal carcinoma treated by intensitymodulated radiotherapy

Objective To evaluate the long-term results and prognostic factors in 582 nasopharyngeal carcinoma ( NPC ) patients treated by intensity modulated radiotherapy ( IMRT ) . Methods 582 newly diagnosed NPC patients treated by IMRT in Sichuan cancer hospital from Jan. 2001 to Dec. 2004were reviewed. According to 2002UICC staging system, there were 36 stage Ⅰ , 144 stage Ⅱ , 224 stage Ⅲ, 178 stage Ⅳa. The Kaplan-Meier method was used to calculate the survival rate. Acute and late toxicities were graded according to the radiation therapy oncology group (RTOG) radiation morbidity scoring criteria. Results The follow up rate was 93.5％. The 5-year local control, regional control, distant metastasis-free survival, disease free survival, disease specific survival and overall survival rate was 89. 8％,95. 2％, 74. 1％, 69.6％, 83.2％ and 77. 1％. There were 29, 13 and 117 patients who had developed local, regional and distant recurrence respectively. The incidence of grade 3 acute ( salivary gland、 oral mucosa and skin) and late toxicity was 44. 5％ and 4. 2％. No grade 4 acute and late toxicity reaction was found. Multivariate analysis showed that clinical stage, N stage, radiotherapy interruption, age, HGB and weight loss were the independent prognostic factors for the overall survival. Conclusions NPC treated with IMRT could get good long-term survival with high quality of life. The clinical stage and N stage were the main prognostic factors for the overall survival. The acute and late toxicities were mainly grade 1 and 2.Distant metastasis is the main cause of treatment failure.