三维适形放疗联合诱导化疗和紫杉醇同期化疗不能手术Ⅲ期非小细胞肺癌的疗效分析

摘要

目的 观察诱导化疗和三维适形放疗(3DCRT)联合每周紫杉醇治疗非小细胞肺癌(NSCLC)的疗效及毒性.方法 56例不能手术的Ⅲ期NSCLC患者予紫杉醇(175 mg/m2第1天)加卡铂(AUC=5～6第1天)诱导化疗2～4个疗程,化疗后3～4周内开始3DCRT,剂量在满足V20≤31%,脊髓≤50 Gy的条件下给予尽可能高(平均60.75 Gy),联合每周紫杉醇40 mg/m2同期化疗.结果 同期放化疗期间,3例因3+4级放射性肺炎,1例因3级心脏毒性终止治疗,2例因身体虚弱分别中断治疗7、12 d,其余均按计划完成治疗.白细胞下降发生率为58.9%(1例为3级,余为1、2级),3级淋巴细胞下降发生率达75.O%.主要急性毒性为放射性食管炎和放射性肺炎,≥2级发生率分别为38%和25%.放射性食管炎3级3例,放射性肺炎3级2例,4级1例.2、3、4级晚期食管损伤各1例,肺纤维化2级9例.肺原发灶总有效率为69.7%.1年生存率分别为72.3%,1年局部无进展生存率为62.7%.局部复发率为32.1%,远处转移率为39.3%,远处转移与局部复发仍是死亡的主要原因.结论 诱导化疗后3DCRT结合每周紫杉醇治疗局部晚期NSCLC耐受性较好,近期疗效好,远期疗效有待继续观察.%Objective To evaluate the toxicity and efficacy of induction chemotherapy(ICT)followed by three-dimensional conformal radiotherapy(3 DCRT)plus concurrent weekly paclitaxel for inoperable non-small cell lung cancer(NSCLC). Methods Patients with stage Ⅲ NSCLC in favorable conditions were treated with 2 to 4 cycles of carboplatin(AUC=5-6,d1)combined with paclitaxel(175 mg/m2,d1),then followed by weekly paclitaxel(40 mg/m2)and concurrent 3DCRT within 3-4 weeks.The prescription dose of radiotherapy was given as high as possible while total lung V20≤31% and total dose of the spinal rncord ≤50 Gy. Results ICT was well tolerated.During the concurrent chemoradiotherapy,the treatment of 4 patients was ended ahead of the schedule because of severe pulmonary and cardiac toxicities:the treatment of 2 patients was delayed for 7 and 12 days because of fatigue.Leucopenia(33/56)was in grade 1-2 except 1 patient in grade 3.Lymphocytopenia was severe(54/56,42 in grade 3).Three patients developed grade 3 acute radiation-induced esophagitis.and 3 developed grade 3-4 radiation-induced pneumonitis.There was one patients each who developed grade 2,3,and 4 late esophageal damage,respectively.Nine developed grade 2 pulmonary fibrosis.The overall response rate was 69.7%.The 1-year overall survival rate was 72.3%.The 1-year local progression-free survival rate was 62.7%. Conclusions The schedule of ICT followed by weekly paclitaxel and concurrent 3DCRT can be well tolerated by most of the favorable patients with stageⅢ NSCLC.and the toxicity is tolerable. Results of this study are encouraging, though long-term results should be followed up.