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1、VOLUME34•NUMBER6•FEBRUARY20,2016JOURNALOFCLINICALONCOLOGYEDITORIALLookingDeepIntotheHeterogeneityofHumanEpidermalGrowthFactorReceptor2–PositiveBreastCancer:CanWeUnderstandItBetter?ShereneLoiandPeterSavas,PeterMacCallumCancerCentre,EastMelbourne,Victoria,Au
2、straliaSeeaccompanyingarticleonpage542Thesuccessoftrastuzumabwhencombinedwithcytotoxicpoint,withallthebenefitsofrandomizedassignment,completeclinicalchemotherapytoalterthepreviouslyaggressivenaturalhistoryofannotation,andconsistenttreatmentadministration.Co
3、rrelativehumanepidermalgrowthfactorreceptor2(HER2)–positivediseasebiomarkerresultsfromaclinicaltrialaremorelikelytoberobust3hasbeenremarkable.Despiteintensiveresearch,understandingtheandreproducibleforthesereasons.2biologicfactorsthatleadtoresistanceinsome
4、patientsandtheInthestudybyCareyetal,thetrastuzumabandlapatinibintegrationofsuchfactorsintotheclinicalsettinghasbeenslow.combinationarmproducedanumericallyhigherbutnotstatisticallyTherelevanceofestrogenreceptor(ER)signalingintermsofre-significantincreaseinth
5、eratesofpCRinthebreast,whichwasthesponseintheneoadjuvantsettingandprognosisintheadjuvantprimaryendpointofthestudy.Thetrastuzumab-alonecontrolarmwassettingisrecognizedbutdoesnotyetinfluencethewaywemanageobservedtohaveahigherpCRraterelativetothatinothercompar
6、able4,5anti-HER2therapy.Theidentificationofbothprognosticandpre-studies.Thismaybepartlyexplainedbytheinclusionofsmallerdictivefactorsbecomesparticularlycriticalasweseemtobemovingtumors($1cm).Notably,however,only64%ofpatientsintheintoaneraofdualanti-HER2ther
7、apy.TheCancerGenomeAtlaslapatinibarmand85%inthecombinationarm(evenafterlapatinibsubjected510primarybreasttumorstomutation,transcript,copydosereduction)comparedwith92%inthecontrolarmcompletednumber,methylation,andproteinanalyses.Only50%ofclinicaltheentirepr
8、otocol-specifiedneoadjuvanttherapy,whichmayhaveHER2-positivetumorswerecharacterizedasHER2enrichedatthecontributedtothelackofstatisticalsignificanceforthecombinationmRNAandproteinlevel,andtherestwerepredominantl