局部晚期非小细胞肺癌VMAT初步疗效和不良反应分析

目的 评估VMAT用于局部晚期非小细胞肺癌(NSCLC)放疗近期疗效和不良反应。 方法 2016年间无法手术的局部晚期NSCLC患者共 58例接受同步放化疗或序贯放化疗,其中男 47例。放疗剂量为 38~66 Gy,53例(92%)患者放疗剂量≥56 Gy。放疗中位次数30次,单次剂量 1.8~3.0 Gy。28例(48%)患者接受同步化疗。 结果 中位随访时间9个月,1年总生存率84%,1年无进展生存48%。11例(19%)患者发生症状性放射性肺炎,其中1例患者因为放射性肺炎死亡。31例(53%)患者在放疗后半年内CT发现无症状性肺局部纤维化。17例(29%)患者出现2级食管炎,10例(17%)患者发生≥3级不良反应,其中9例为白细胞减少。 结论 采用VMAT行局部晚期NSCLC胸部放疗近期疗效理想,不良反应可接受,肺炎风险未见增加。

Short-term clinical efficacy and adverse events of volumetric modulated arc therapy in patients with locally advanced non-small cell lung cancer

Objective To evaluate the short-term clinical efficacy and adverse events of volumetric modulated arc therapy (VMAT) in the treatment of locally advanced non-small cell lung cancer (NSCLC). Methods From January to December 2016,58 patients (47 male and 11 female) with unresectable locally advanced NSCLC received concurrent or sequential chemoradiotherapy. The radiation dose was ranged from 38 Gy to 66 Gy. The radiation dose was equal or higher than 56 Gy in 53 patients (92%).The median radiotherapy fraction was 30,1.8 Gy to 3.0 Gy for each fraction. Twenty-eight patients (48%) received concurrent chemoradiotherapy. Results The median follow-up time was 9 months. The 1-year overall survival (OS) rate was 84% and the 1-year progression-free survival (PFS) rate was 48%.Eleven patients (19%) suffered from symptomatic radiation pneumonitis and one of them died of radiation pneumonitis. Within 6 months after radiotherapy,31 patients (53%) developed asymptomatic local pulmonary fibrosis on CT images. Seventeen patients (29%) suffered from grade Ⅱ esophagitis. Ten cases (17%) had ≥ grade Ⅲ adverse events and 9 of them presented with leucopenia. Conclusions VMAT yields high short-term clinical efficacy and tolerable adverse events in the treatment of locally advanced NSCLC,which does not increase the risk of pneumonitis.