背景
基于21-基因测定乳腺癌的复发评分,如果评分很高可预测能通过化疗获益,并且在没有化疗的情况下复发的风险较低;然而,对于大多数具有中等评分的患者,化疗的益处仍存在不确定性。
Background:Therecurrencescorebasedonthe21-genebreastcancerassaypredictschemotherapybenefitifitishighandalowriskofrecurrenceintheabsenceofchemotherapyifitislow;however,thereisuncertaintyaboutthebenefitofchemotherapyformostpatients,whohaveamidrangescore.
方法
我们进行了一项前瞻性试验,涉及10,名激素受体阳性,人表皮生长因子受体2(HER2)阴性,腋窝淋巴结阴性的乳腺癌患者。在名符合随访资料的合格患者中,名(69%)中位复发评分为11至25分,随机分配接受单独的化疗内分泌治疗或内分泌治疗。该试验旨在显示非内分泌治疗单独用于侵入性无病生存(定义为免于侵袭性疾病复发,第二原发癌或死亡)的非劣效性。
Weperformedaprospectivetrialinvolving10,womenwithhormone-receptor–positive,humanepidermalgrowthfactorreceptor2(HER2)–negative,axillarynode–negativebreastcancer.Oftheeligiblepatientswithfollow-upinformation,(69%)hadamidrangerecurrencescoreof11to25andwererandomlyassignedtoreceiveeitherchemoendocrinetherapyorendocrinetherapyalone.Thetrialwasdesignedtoshownoninferiorityofendocrinetherapyaloneforinvasivedisease–freesurvival(definedasfreedomfrominvasivediseaserecurrence,secondprimarycancer,ordeath).
结果
在分析无侵袭性无病生存时,内分泌治疗不劣于化疗内分泌治疗(侵袭性疾病复发风险比,第二原发癌或死亡[内分泌与化疗内分泌治疗],1.08;95%置信区间,0.94至1.24;P=0.26)。在9年时间里,两个治疗组的侵袭性无病生存率相似(内分泌治疗组为83.3%,化疗内分泌治疗组为84.3%),远离疾病复发的无病生存率(94.5%和95.0%)或远处或局部区域(92.2%和92.9%)以及总体生存率(93.9%和93.8%)。无侵袭性无病生存的化疗效果随着复发评分和年龄的组合而变化(P=0.),50岁以下女性化疗的某些获益与复发评分为16-25。
Endocrinetherapywasnoninferiortochemoendocrinetherapyintheanalysisofinvasivedisease–freesurvival(hazardratioforinvasivediseaserecurrence,secondprimarycancer,ordeath[endocrinevs.chemoendocrinetherapy],1.08;95%confidenceinterval,0.94to1.24;P=0.26).At9years,thetwotreatmentgroupshadsimilarratesofinvasivedisease–freesurvival(83.3%intheendocrine-therapygroupand84.3%inthechemoendocrine-therapygroup),freedomfromdiseaserecurrenceatadistantsite(94.5%and95.0%)oratadistantorlocal–regionalsite(92.2%and92.9%),andoverallsurvival(93.9%and93.8%).Thechemotherapybenefitforinvasivedisease–freesurvivalvariedwiththe