脑转移瘤X线立体定向放射治疗的疗效及影响因素

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1.华南肿瘤学国家重点实验室,广东广州510060

2.中山大学肿瘤防治中心

放射治疗科,

广东广州510060

1.StateKeyLaboratoryof

OncologyinSouthChina,

Guangzhou,Guangdong510060,P.R.China

2.DepartmentofRadiation

Oncology,

SunYat-senUniversityCancer

Center,

Guangzhou,Guangdong510060,P.R.China

通讯作者:吴少雄

Correspondenceto:Shao-XiongWuTel.:86.20.87343384

Fax:86.20.87342025

Email:wushaox@mail.sysu.edu

.cn

收稿日期:2009-08-18

接受日期:2009-09-02《癌症》ChineseJournalofCancer,2010,29(2):217-222

·临床研究·

[Abstract]BackgroundandObjective:X-raystereotacticradiotherapy(SRT)

isoneoftheeffectivetreatmentsforbrainmetastases(BM).Thisstudywas

toevaluatetheefficacyofSRTonBM,andinvestigateprognosticfactors.

Methods:BetweenJuly1999andDecember2004,atotalof122intracranial

lesionsin78patientswithBMweretreatedusingSRTinourcenter.Forty-

ninepatientshadasolitarylesionand29hadmultiple(2-6)lesions.The

medianSRTdosewas15Gy(11-24Gy)insinglefractionfor38lesions,

and24Gy(11-40Gy)in2-6fractionsfor84lesions.SRTwascombined

withwholebrainradiotherapy(WBRT)of30-40Gyfor39patients.

Progression-freesurvival(PFS)andoverallsurvival(OS)wereestimatedby

Kaplan-Meiermethod.Univariateandmultivariateanalyseswereperformed

bythelog-ranktestandCoxmodel,respectively.Results:Themedian

survivaltimewas12.9months(1.7-77.4months).The1-yearintracranial

PFSratewas87.4%.The1-and2-yearOSrateswere53.9%and25.8%,

respectively.Univariateanalysisshowedthatthe1-yearOSrateswere

significantlyhigherinthepatientswithpretreatmentKPSof≥70,

extracraniallesionscontrolledandSRTcombinedwithWBRTthaninthose

withKPSof<70(60.7%vs.29.4%,P=0.002),extracraniallesions

uncontrolled(69%vs.44.9%,P=0.005)andSRTalone(64.1%vs.

43.4%,P=0.03).ThebenefitoftreatingwithWBRTincombinationwas

mainlyachievedinpatientswithextracraniallesionscontrolledorwithmore

thanoneintracraniallesion.MultivariateanalysisshowedthatKPSscoreand

statusofextracraniallesionswereindependentprognosticfactorsforOS.

Conclusions:SRTisaneffectiveandsafemodalityforBM.SRTcombined

withWBRTmayprolongthesurvivaltimeforpatientswithextracraniallesions

controlledormultipleintracraniallesions.Independentprognosticfactorsfor

OSareKPSscoreandstatusofextracraniallesions.

Keywords:Brainmetastasis,effect,prognostic,stereotacticradiotherapy

【摘要】背景与目的:X线立体定向放射治疗(X-raystereotacticradiotherapy,

SRT)是治疗脑转移瘤的有效方法之一,该研究意在评价脑转移瘤患者SRT的疗

效以及影响预后的因素。方法:自1999年7月至2004年12月止,78例脑转移瘤

患者在本中心接受SRT方式治疗。其中,49例为单发病灶,29例为多发(2~6个)

病灶,总病灶数为122个。38个病灶采用SRT单次治疗,中位处方剂量为15Gy

(11~24Gy)。84个病灶采用SRT分次(2~6次)治疗,中位处方剂量为24Gy(11~

40Gy)。39例SRT联合全脑放疗30~40Gy。无进展生存率(progression-free

survival,PFS)和总生存率(overallsurvival,OS)分析采用Kaplan-Meier法,单因素

脑转移瘤X线立体定向放射治疗的疗效及影响因素

魏微1,2,邓美玲1,2,吴少雄1,2,曾智帆1,2,李凤岩1,2,

王汉渝1,2,包勇1,2,高远红1,2,陈立新1,2

EfficacyofX-raystereotacticradiotherapyonbrainmetastasesand

prognosticanalysis

WeiWei1,2,Mei-LingDeng1,2,Shao-XiongWu1,2,Zhi-FanZeng1,2,Feng-YanLi1,2,

Han-YuWang1,2,YongBao1,2,Yuan-HongGao1,2,Li-XinChen1,2

217

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