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包勇陈明⑺,李凯新巴张力阳,徐光川皿作者单位:510060广州,|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;°中山大学肿瘤防治中心化疗科;590000江门,彳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(175吨/11?dl)加卡钳(AUC=5〜6dl)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S50Gy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例因身体虚弱分别屮断治疗7天及12天,其余均按计划完成治疗。白细胞下降发生率为5&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,22度发牛率分别为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吋间为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」%(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。肺肿瘤;癌;菲小细胞性;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・dimensionalConformalRadiotherapyandConcurrentWeeklyPaclitaxelforStageIIINon-smallCellLungCancerABSTRACTBackgroud&Objective:Theefficacyofradiotherapyaloneonlocallyadvancednon-smallcelllungcancer(NSCLC)ispoor.Althoughthecombinedmodalityofchemoradiotherapyanddose-escalationofradiotherapyhavebeenthemaintrends,theoptimalmodalitystillremainsunknown.Thisstudywastoevaluatethetoxicityandefficacyofinductionchemotherapy(ICT)followedbythree-dimensionalconformalradiotherapy(3DCRT)andconcurrentweeklypaclitaxelonunresectableNSCLC.Methods:StageIIINSCLCpatientswithfavorableconditionsweretreatedwith2to4cyclesofcarboplatin(AUC=5-6,dl)combinedwithpaclitaxel(175mg/m2,dl),thenfollowedbyweeklypaclitaxel(40mg/m2)andconcurrent3DCRTwithin3-4weeks.TheprescriptiondosewasgivenashighaspossibleundertheconditionthatV20<31%andspinalcorddosc<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.The4-yearlocalprogression-fi*eesurvivalrateswere62.7%,37.5%and17.9%respectively,withthemedia...