碳离子治疗IMRT后局部区域复发鼻咽癌初步研究——上海市质子重离子医院临床经验

目的 分析再程调强碳离子放疗(IMCT)对IMRT后局部区域复发鼻咽癌的疗效及不良反应。方法 纳入112例于2015-2018年接受挽救性再程IMCT的局部区域复发鼻咽癌患者,Ⅰ、Ⅱ、Ⅲ、Ⅳ期患者分别为10例(9%)、26例(23%)、41例(37%)、35例(31%),中位年龄48岁(17~70岁),中位照射剂量为60GyE(50~69GyE)。结果 中位随访20个月(5~45个月),共20例患者死亡,42例患者局部复发,2年总生存(OS)率与无局部进展生存(LPFS)率分别为85%与52%。单因素与多因素分析中Ⅳ期患者OS均显著差于其他患者,未发现与LPFS显著相关的预后因素。治疗期间未见≥3级急性不良反应。≥3级晚期不良反应包括1例口干、2例听力下降、1例大脑颞叶损伤与19例鼻咽黏膜坏死。结论 再程IMCT治疗局部区域复发鼻咽癌取得了较好疗效且严重不良反应发生率较低,远期疗效及不良反应有待进一步随访。

Preliminary study of intensity-modulated carbon ion reirradiation for locoregionally recurrent nasopharyngeal carcinoma after definitive IMRT——Clinical experience from Shanghai Proton Heavy Ion Hospital

Objective To evaluate the short-term efficacy and toxicities of intensity-modulated carbon ion radiotherapy (IMCT) for patients with locoregionally recurrent nasopharyngeal carcinoma after intensity-modulated radiotherapy (IMRT). Methods A total of 112 patients with locoregionally recurrent nasopharyngeal carcinoma undergoing salvaging IMCT between May 2015 and February 2018were enrolled in the study. All patients previously received one course of definitive X-ray IMRT. Among them,10 patients (9%) were diagnosed with stage Ⅰ,26 patients (23%) with stage Ⅱ,41 patients (37%) with stage Ⅲ and 35 patients (31%) with stage Ⅳnasopharyngeal carcinoma,respectively. The median age of the cohort was 48 years (range,17-70 years) old. The median dose to the gross tumor volume (GTV) was 60 GyE (range,50-69 GyE). Results With a median follow-up time of 20 months (range,5-45 months),20 patients died and 42 patients developed local recurrence. The 2-year overall survival (OS) and local progression-free survival (LPFS) rates were 85% and 52%. Both univariate and multivariate analyses demonstrated that stage Ⅳ disease was associated with significantly worse OS. No predictors were found for LPFS. No acute toxicity of grade 3 or higher was observed during reirradiation. Severe (grade 3 or above) late toxicities included xerostomia (n=1),hearing impairment (n=2),temporal lobe injury (n=1) and mucosal necrosis (n=19).Conclusions IMCT is an efficacious and safe treatment for patients with locoregionally recurrent nasopharyngeal carcinoma with acceptable toxicity profile. Long-term follow-up is necessary to further evaluate the long-term efficacy and late toxicities.