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1、三阴性乳腺癌的治疗现状湖北省肿瘤医院乳腺科吴新红2011年StGallen共识乳腺癌亚型亚型定义LuminalA型ER和(或)PR阳性,HER2阴性,Ki67低表达(<14%)LuminalB型LuminalB(HER2阴性),ER和(或)PR阳性,HER2阴性,Ki67高表达(≥14%)LuminalB(HER2阳性),ER和(或)PR阳性,HER2过表达或增殖,Ki67任何水平HER-2过表达型HER2阳性(非Luminal),ER和PR缺失,HER2过表达或增殖基底样型三阴性(导管),ER和PR缺失,HER2阴性一、三阴性乳腺癌(T
2、NBC):概念Triplenegativeandbasal-likeBasalbutnottriplenegative15-40%areER+,PR+orHER2+TriplenegativebutnotbasalClinicalassay(IHC)GenearraysER-/PgR-/HER2-BRCA1、Basal-Like、TNBC乳腺癌的关系LeslieK.etal.Adv.Anat.Pathol.2007;14:419-430Basal-likeTripleNegativeBRCA1二、TNBC的风险因素(排除BRCA状态
3、)YoungerageatmenarcheHigherparityYoungerageatfulltermpregnancyShorterdurationofbreastfeedingHighbodymassindex(BMI)HighwaisttohipratioLackofexerciseFulfordetal,Histopathology2006;Livasyetal,ModPathol,2006,BauerKRCancer2007CareyJAMA2006三、TNBC预后因素LargetumorsizePresenceofnoda
4、lmetastasisPresenceofdistantmetastasisPresenceofcentralnecrosisAbsenceofandrogenreceptorBasalphenotypeEGFRAge<40?(Liedtkeetal.ASCO2010)占所有乳腺癌病理类型的10.0%~20.8%;具有特殊的生物学行为和临床病理特征;预后较其他类型差;多发生于绝经前年轻女性;尤其是非洲裔美国妇女:50岁以下非洲裔美国妇女的发病率甚达39%;白种人则仅为16%。四、TNBC-流行病学组织学分级多为Ⅲ级,细胞增殖比例较高,c-
5、kit、p53、EGFR表达多为阳性,基底细胞标志物细胞角蛋白(CK)5/6、17也多为阳性。五、TNBC-分子病理特征临床表现为侵袭性病程;远处转移风险较高,内脏转移几率较骨转移高,脑转移几率也较高。预后较差,死亡风险较高。六、TNBC-临床特征TNBC:ShorterMedianTimefromDistantRelapsetoDeath22months9monthsDentR,TrudeauM,PritchardK,HanaW,NarodS.etal.ClinicalCancerRes2007“TripleNegative”Othe
6、rBreastCancerTNBC与Non-TNBC的生存比较TNBC:RecurrenceandSurvivalIncreasedlikelihoodofdistantrecurrenceVisceralmetastasestobrain,lung,anddistantnodalsitescommonMetastasestoboneandliverlesscommonRelapsemostlikelyduringthefirst3yaftertherapyMajorityofdeathswithinfirst5yBy10years,OS
7、differencesbetweenTNBC&non-TNBCareminimalKimetal.SABCS2009.Abstract4065.七、TNBC的治疗策略TNBCparadox:chemosensitive,butrelapsemoreaggressivewithworseOSCannottreatwithstandardtargetedtherapies(hormonaltherapyoranti-HER2agents)QuestionofbevacizumabopenLimiteddataavailablefrompros
8、pectivetrialsinthispopulationBestavailabledatamostlyretrospectivesubpopulationanalysesNospecific