三维适形放疗联合诱导化疗和紫杉醇每周同期化疗治疗不能手术III期非小细胞肺癌的疗效分析王卫华1,2,包勇1,2,陈明1,2*,李凯新1,3,张力1,4,徐光川1,4作者单位:510060广州,1华南肿瘤学国家重点实验室;2中山大学肿瘤防治中心放疗科;4中山大学肿瘤防治中心化疗科;590000江门,3广东省江门市中心医院肿瘤科;*通讯作者:陈明摘要目的:局部晚期非小细胞肺癌(NSCLC)单纯放疗局部控制率差,放化综合治疗及放疗剂量递增成为提高局控的主要研究方向,但最佳治疗模式尚未确定。本研究旨在观察诱导化疗和三维适形放射治疗(3DCRT)联合每周紫杉醇治疗NSCLC的疗效及毒性。方法:不能手术的III期NSCLC患者予紫杉醇(175mg/m2d1)加卡铂(AUC=5~6d1)诱导化疗2~4疗程,化疗后3~4周内开始3DCRT,剂量在满足V20≤31%,脊髓≤50Gy的条件下给予尽可能的高,联合每周紫杉醇40mg/m2同期化疗。结果:56例患者入组,诱导化疗毒性可耐受。同期放化疗期间,3例因3/4度放射性肺炎、1例因3度心脏毒性终止治疗,2例因身体虚弱分别中断治疗7天及12天,其余均按计划完成治疗。白细胞下降发生率为58.9%(33/56,1例为3度,余为1~2度);3度淋巴细胞下降发生率达75%(42/56)。主要急性毒性为放射性食管炎和放射性肺炎,≥2度发生率分别为37.5%和25.1%。放射性食管炎3度有3例,放射性肺炎3度有2例,4度1例。2~4度后期食管损伤各有1例发生;肺纤维化均不超过2度。肺原发灶总有效率(CR+PR)为69.7%(38/56;CR,1/56;PD,2/56)。中位生存时间19.9个月,1、3、5年生存率分别为72.3%、33.3%、19.4%,中位局部无进展生存时间为15.7个月,1、2、4年局部无进展生存率分别为62.7%、37.5%、17.9%。局部复发率32.1%(18/56),远处转移率39.3%(22/56),远处转移与局部复发仍是死亡主要原因。结论:1.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,大多数患者能按期完成治疗计划;2.疗效令人鼓舞,但远处转移及局部复发仍为主要失败及死亡原因。【关键词】肺肿瘤;癌;非小细胞性;三维适形放射治疗;诱导化疗;同期放化疗;紫杉醇中图分类号:R734.2Long-termResultsofInductionChemotherapyFollowedbyThree-dimensionalConformalRadiotherapyandConcurrentWeeklyPaclitaxelforStageNon-smallCellLungCancerⅢABSTRACTBackgroud&Objective:Theefficacyofradiotherapyaloneonlocallyadvancednon-smallcelllungcancer(NSCLC)ispoor.Althoughthecombinedmodalityofchemoradiotherapyanddose-escalationofradiotherapyhavebeenthemaintrends,theoptimalmodalitystillremainsunknown.Thisstudywastoevaluatethetoxicityandefficacyofinductionchemotherapy(ICT)followedbythree-dimensionalconformalradiotherapy(3DCRT)andconcurrentweeklypaclitaxelonunresectableNSCLC.Methods:StageIIINSCLCpatientswithfavorableconditionsweretreatedwith2to4cyclesofcarboplatin(AUC=5-6,d1)combinedwithpaclitaxel(175mg/m2,d1),thenfollowedbyweeklypaclitaxel(40mg/m2)andconcurrent3DCRTwithin3-4weeks.TheprescriptiondosewasgivenashighaspossibleundertheconditionthatV20≤31%andspinalcorddose≤50Gy.Results:Fifty-sixpatientswereenrolled.ICTwaswelltolerated.Duringtheconcurrentchemoradiotherapy,thetreatmentof4patientswasendedaheadoftheschedulebecauseofseverepulmonaryandhearttoxicities;thetreatmentof2patientswasdelayedfor7and12daysbecauseoffatigue.Myelosuppressionwasmild(33/56):allweregrade1-2except1wasgrade3.Lymphocytopeniawasmoreobvious(54/56,grade3in42).Threepatientsdevelopedgrade3radiation-inducedesophagitis,and3developedgrade3-4radiation-inducedpneumonitis.Onedevelopedgrade2-4esophagealdamagerespectively.Nograde3-4pulmonaryfibrosiswasobserved.Theoverallresponseratewas69.7%.The1-,3-,5-yearoverallsurvivalrateswere72.3%,33.3%and19.4%,respectively,withthemediansurvivaltimeof19.9months.The1-,2-,4-yearlocalp...