紫杉醇脂质体联合表柔比星新辅助化疗三阴性乳腺癌临床疗效分析

目的:评价紫杉醇脂质体联合表柔比星对三阴性乳腺癌新辅助化疗的临床疗效和预后相关因素。方法:回顾性分析2008年1月—2009年12月接受紫杉醇脂质体联合表柔比星新辅助化疗的三阴性乳腺癌患者的临床特征、新辅助化疗的疗效以及与预后相关的因素。结果:113例三阴性乳腺癌患者接受新辅助化疗,临床完全缓解(cCR)48.67%(55/113),病理完全缓解(pCR)40.71%(46/113)。pCR患者的5年无病生存率和总生存率分别为84.78%和95.65%,非pCR患者的5年无病生存率和总生存率分别为49.25%和82.09%,差异均有统计学意义(P=0.005、0.003)。结论:三阴性乳腺癌患者对新辅助化疗较为敏感,而pCR患者的预后明显优于非pCR患者。     

增强磁共振成像对乳腺癌新辅助化疗后病理完全缓解的预测价值

目的 探讨增强磁共振成像(magnetic resonance imaging,MRI)预测乳腺癌患者新辅助治疗(neoadjuvant chemotherapy,NAC)后病理完全缓解(pathologic complete response,pCR)的准确性。方法 回顾性收集2020年3月至2022年4月期间于西南医科大学附属医院就诊并完成了NAC后行手术治疗的245例浸润性乳腺癌患者临床病理资料。根据免疫组织化学检测的激素受体(hormone receptor,HR)和人表皮生长因子受体2(human epidermal growth factor receptor 2,HER2)结果分为HR⁺/HER2^–、HR⁺/HER2⁺、HR^–/HER2⁺及HR^–/HER2^–4个亚组。以术后病理学结果为金标准，与术前MRI评估的残余肿瘤大小作对比，分析MRI评价NAC疗效的价值。同时分析增强MRI评估结果预测pCR的...     

乳腺癌新辅助治疗病理完全缓解影响因素及预后分析

目的 分析乳腺癌新辅助治疗病理完全缓解（pCR）的影响因素,并探讨pCR对预后的意义。方法 回顾性分析2008年1月至2014年12月北京大学第一医院乳腺疾病中心接受新辅助治疗的324例女性乳腺癌病例资料,分析临床病理信息及预后随访数据,探讨pCR的预测因素及其对预后的意义。结果 新辅助治疗pCR率为21.9%;不同分子分型pCR率差异具有统计学意义（P<0.001）,其中Luminal B［人类表皮生长因子受体（HER2）阳性］型、HER2过表达型、三阴型更易获得pCR,pCR率分别为30.6%、37.5%、32.4%;pCR对于不同分子分型预后的意义存在差异,HER2过表达型［无病存活率（DFS）：P=0.048;总存活率（OS）：P=0.050］及三阴型乳腺癌（DFS：P=0.040;OS：P=0.045）pCR预后优于非pCR。治疗前肿瘤孕激素受体（OR=0.297,95%CI=0.167～0.530,P＜0.001）、HER2（OR=2.351,95%CI=1.340～4.125,P=0.003）、Ki67表达（OR=6.870,95%CI=0.885～53.303,P=0.065）是pCR的独立影响因素。结论 治疗前肿瘤孕激素受体和HER2表达状态、Ki67表达水平是pCR的独立影响因素;pCR可作为HER2过表达型和三阴型乳腺癌远期预后的预测指标之一。     

表阿霉素联合多西紫杉醇新辅助化疗治疗三阴乳腺癌的疗效及预后评价

目的探讨三阴乳腺癌(TNBC)与非三阴乳腺癌(non-TNBC)接受表阿霉素联合多西紫杉醇方案(ET方案)的化疗敏感性及预后方面的差别。方法对接受ET新辅助化疗方案治疗的249例乳腺癌患者进行回顾性分析。依据免疫组化雌激素受体(ER)、孕激素受体(PR)、表皮生长因子受体2(HER2)表达水平将乳腺癌分为三阴乳腺癌及非三阴乳腺癌两类,分析三阴与非三阴乳腺患者接受ET新辅助化疗方案后,二者病理疗效及远期生存的差别。结果 249例患者中,54(21.7%)例为三阴乳腺癌,195(78.3%)例为非三阴乳腺癌。三阴乳腺癌的病理完全缓解(pCR)率为25.9%,明显高于非三阴乳腺癌的12.3%(P=0.019)。三阴乳腺癌患者,特别是新辅助化疗后仍有癌残留的患者,其5年无病生存率(DFS)及5年的总生存率(OS)均明显低于非三阴乳腺癌(P值均<0.05)。获得pCR的乳腺癌患者5年的DFS和OS均明显高于化疗后仍有癌残留的患者(P值均<0.05)。获得pCR的三阴乳腺癌与非三阴乳腺癌患者的DFS(P=0.837)及OS(P=0.398)均无统计学差异。结论本研究结果表明,相比于非三阴乳腺癌患者,三阴乳腺癌患者具有更高的病理完全缓解率,但预后却较差。     

中国118家三级医院早期HER2阳性乳腺癌新辅助治疗现状调查报告

目的 调查中国早期人类表皮生长因子受体2(HER2)阳性乳腺癌病人新辅助治疗现状。方法 采用问卷调查的方式,登记2023年1月1日至6月30日各医院经治的乳腺癌病例,调查内容包括病理实验室资质、HER2检测试剂、收治早期乳腺癌例数、HER2阳性乳腺癌例数、接受含抗HER2靶向药物的新辅助治疗例数和新辅助治疗结局。结果 全国13个省、自治区和直辖市118家三级医院参加调查并提供病例资料,包括99家综合性医院和19家肿瘤专科医院。其中85家（72%）医院具备病理实验室资质认证并使用经国家药品监督管理局批准的HER2检测试剂认证,33家（28%）医院未能提供病理实验室资质或检测试剂。118家医院共收治39 014例早期乳腺癌病例,其中,HER2阳性乳腺癌9160例,HER2阳性率23.5%。3222例（35.2%）病人接受了双靶方案新辅助治疗,病理完全缓解（pCR）率为51.3%。具有HER2检测资质认证的医院双靶新辅助治疗pCR率显著高于未提供资质认证医院（56.2%vs. 48.0%,P=0.046）。结论 规范和推广病理实验室资质及HER2检测试剂认证是改善乳腺癌临床同质化诊治水平的重...     

发病年龄对乳腺癌保留乳房治疗后长期生存的影响

目的探讨年龄对乳腺癌患者保留乳房治疗后长期复发及生存结局的影响。方法从北京大学肿瘤医院乳腺癌预防治疗中心数据库中回顾性收集1999年12月至2014年12月2778例原发性乳腺癌保留乳房治疗病例的资料,中位年龄47岁(范围:21~91岁)。根据发病年龄将患者分为≤40岁组(677例)与>40岁组(2101例),比较两组患者的临床特征。采用Kaplan-Meier法绘制生存曲线,并用Log-rank法比较两组局部复发率、无远处转移动生存(DDFS)、无病生存(DFS)及乳腺癌特异性生存(BCSS),采用Cox比例风险模型分析复发及生存的预后因素。结果≤40岁组和>40岁组的激素受体阳性比例(490/677比1581/2101,χ²=6.981,P=0.030)、腋窝淋巴结阳性比例(314/677比713/2101,χ²=34.966,P<0.01)、T1期比例(301/677比1160/2101,χ²=37.660,P<0.01)、接受新辅助化疗比例(413/677比1010/2101,χ²=34.272,P<0.01)的差异均有统计学意义。中位随访102个月。≤40岁组和>40岁组10年局部复发率差异无统计学意义(2.5%比1.6%,P=0.147)。≤40岁组和>40岁组10年DDFS率分别为90.6%和95.3%(P<0.01),10年DFS率分别为86.5%和91.1%(P=0.001),10年BCSS率分别为91.0%和93.7%(P=0.105)。年龄不是局部复发的独立预后因素(P>0.05);淋巴结状态(阳性比阴性,HR=2.73,95%CI:1.94~3.84,P<0.01)、年龄(≤40岁比>40岁,HR=1.73,95%CI:1.24~2.42,P=0.001)、肿瘤最大径(>2 cm比≤2 cm,HR=1.61,95%CI:1.14~2.28,P=0.001)是DDFS和DFS的独立预后因素;激素受体状态(阳性比阴性,HR=0.54,95%CI:0.39~0.74,P<0.01)、淋巴结状态(阳性比阴性,HR=2.94,95%CI:2.12~4.07,P<0.01)、肿瘤最大径(>2 cm比≤2 cm,HR=1.45,95%CI:1.05~2.01,P=0.025)是BCSS的独立预后因素。结论≤40岁与>40岁乳腺癌患者保留乳房治疗后局部复发风险相似,前者长期生存劣于后者。     

ER、PR、HER2和Ki-67在乳腺癌新辅助化疗前后表达变化的临床意义

【摘要】 目的 探讨新辅助化疗前后ER、PR、HER2、Ki-67表达的改变与乳腺癌新辅助化疗疗效的关系。方法 收集广东省妇幼保健院乳腺外科2007年1月1日至2012年12月31日收治的72例接受新辅助化疗的ⅡA~ⅢC期的乳腺癌资料,回顾性分析临床特征、ER、PR、HER2及Ki-67表达水平与新辅助化疗疗效的关系。结果 72例乳腺癌患者新辅助化疗总有效率(RR)为76.4%(55/72),其中有16.7%(12/72) 病例达临床完全缓解(CR),59.7%(43/72)病例达临床部分缓解(PR)。23.6%(17/72)的病例为病情稳定(SD),无患者获得疾病进展(PD),病理完全缓解(pCR)7例(9.72%)。原发肿瘤大小、ER、PR、Ki-67表达与新辅助化疗的临床有效率相关(P<0.05);病理完全缓解率(pCR)与ER、PR状态相关(P<0.05);ER新辅助前后发生改变的约22.2%,PR发生改变的约25.0%,HER2发生改变的约15.3%,Ki-67发生改变的约55.6%;新辅助化疗疗效与ER、PR、Ki-67化疗前后的改变相关(P<0.05),与HER2的改变无关(P>0.05)。结论 乳腺癌新辅助化疗后ER、PR、HER2和Ki-67的表达可发生改变,并且ER、PR和Ki-67表达的改变可预测新辅助化疗的疗效。     

老年乳腺癌的临床病理特点和预后的特点

目的探讨老年乳腺癌的临床病理和预后特点。方法收集2003年1月至2012年12月73例接受住院治疗Ⅰ～ⅢA期≥65岁乳腺癌患者的资料,分析临床病理特征、预后特点。结果73例患者中65～69岁有42例,≥70岁有31例。≥70岁患者伴有合并症的比率较65～69岁患者的高(72.4%vs 42.6%,P=0.009),≥70岁患者ER/PR阳性的比率较65～69岁患者的高(80.6%vs57.1%,P=0.045),≥70岁患者未接受辅助化疗的比率较65～69岁患者的高(58.1 vs 26.2%,P=0.045)。中位随访85个月,无病生存率为82.2%,总生存率86.3%。单因素分析发现乳腺癌的无病生存与肿瘤大小(P=0.020)、淋巴结转移(P=0.010)相关,总生存与HER2状态(P=0.001)相关;多因素分析发现老年乳腺癌的预后与年龄(P=0.644)、合并症(P=0.314)、肿瘤大小(P=0.363)、淋巴结状态(P=0.387)、ER/PR(P=0.250)、HER2(P=0.579)、手术方式(P=0.666)、辅助化疗(P=0.787)、放疗(P=0.107)、内分泌治疗(P=0.340)无明显关系。单因素分析和多因素分析均发现年龄、合并症、ER/PR、手术方式、辅助化疗、放疗、内分泌治疗均与DFS和OS无明显相关。结论随着年龄的增长,老年乳腺癌患者ER/PR阳性比率增加,伴有内科合并症多,应全面综合评估患者的耐受性和获益程度选择治疗方式。     

体重指数与乳腺癌预后的相关性分析

目的:评价体重指数(BMI)与乳腺癌预后的关系。方法:回顾性分析672例乳腺癌患者的临床病例资料及随访信息,根据BMI分为超重肥胖组(BMI≥25.0 kg/m2)与正常组(BMI25.0 kg/m~2)。Kaplan-Me ie r法比较两组生存差异,非条件Logis tic回归分析不同BMI分组乳腺癌OS的相关因素。结果:456例患者纳入分析,超重肥胖组(286例)与正常组(170例)一般临床病理特征差异无统计学意义(P0.05)。中位随访60.9个月,两组无病生存时间(DFS)及总生存时间(OS)差异无统计学意义(P=0.927、0.336)。年龄、月经状态、ER及HER2等与不同BMI分类乳腺癌的OS无关。BMI分类不影响新辅助化疗病理性完全缓解(pCR)率,但与新辅助化疗ER阳性乳腺癌的DFS(P=0.013)及OS(P=0.022)有关。超重肥胖组生存较差(OR=0.16,95%CI:0.03~0.93,P=0.042)。内分泌治疗亚组中超重肥胖组病例生存风险降低(OR=0.077,95%CI:0.08~0.714,P=0.024)。结论:BMI≥25.0 kg/m~2是ER阳性乳腺癌新辅助化疗后DFS和OS的危险因素,可能与内分泌治疗获益不足有关。     

局部晚期乳腺癌新辅助化疗预后因素分析

目的 探讨术前接受长春瑞滨联合表柔比星(VE)方案治疗的局部晚期乳腺癌的预后影响因素.方法 回顾分析2001年9月至2006年5月术前接受3个周期VE方案化疗的119例局部晚期乳腺癌患者的临床病理资料.所有患者均经术前空心针活检证实为浸润性乳腺癌,新辅助化疗后接受手术治疗.术后根据新辅助化疗的临床疗效,再继续接受3个周期VE或标准的环磷酰胺+表柔比星+氟尿嘧啶(CEF)方案辅助化疗及局部区域放射治疗和相应的内分泌治疗.分析新辅助化疗前及术后临床病理资料与预后的关系.结果 新辅助化疗后临床完全缓解27例(22.7%),部分缓解78例(65.5%);肿瘤原发灶病理完全缓解(pCR)22例(18.5%).本组115例(96.6%)获得随访,随访时间9～76个月,中位时间63.4个月.无局部复发转移患者共72例(60.5%).5年无病生存率为58.7%,5年总生存率为71.3%.多因素分析显示,新辅助化疗前Ki-67(pre-Ki-67)高表达(P=0.012)、化疗后Ki-67(post-Ki-67)高表达(P=0.045)、化疗后病理未完全缓解(P=0.034)与无病生存时间的降低有关;pre-Ki-67高表达(P=0.017)、post-Ki-67高表达(P=0.001)、pre-ER阴性(P=0.002)、化疗后病理未完全缓解(P=0.034)与总生存时间的降低有关.结论 pre-Ki-67、post-Ki-67及pre-ER的表达水平和新辅助化疗后肿瘤原发灶病理状况是接受术前3个周期VE新辅助化疗局部晚期乳腺癌的独立预后因素.     

Pathological response and survival after neoadjuvant therapy for breast cancer: A 30-year study

Purpose of the researchHER2-positive and triple-negative breast cancer (TNBC) still have a poor prognosis. Pathological complete response (pCR) is usually considered a surrogate marker for outcome. The aim of this study was to reconsider these parameters on a large population after a long follow-up. 348 patients with unilateral breast cancer who received neoadjuvant treatment at our institution over 30 years were included.ResultsPatients were classified according to hormonal receptors (HR) and HER2. Median follow-up was 7 years. pCR was significantly lower in HR+/HER2? tumors (P < 0.0001). The 7-year OS rates were 76.1% (HR+/HER2?), 60.1% (TNBC), 72.4% (HR+/HER2+), and 49.9% (HR?/HER2+). Disease-free survival (DFS) and OS differed significantly according to pCR. Among HER2+ patients, pCR rate, DFS and OS were greater with trastuzumab.ConclusionsTNBC and HR?/HER2+ tumors have the worst outcome. pCR remains a significant prognostic factor. Trastuzumab strongly improves pCR and survival in HER2+ tumors.     

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??Analysis of the predicted factors of pathological complete response (pCR) after neoadjuvant systemic therapy in primary breast cancer and the prognostic value of pCR GAO Guo-xuan*??ZHANG Yan??ZHANG Hong??et al. *Breast Disease Center??Peking University First Hospital??Beijing 100034??China
Corresponding author??ZHANG Hong??E-mail??zhanghong1030@gmail.com
Abstract Objective To explore the predicted factors and the prognostic value of pathological complete response (pCR). Methods The clinical data of patients with primary breast cancer received neoadjuvant systemic therapy ??NST????subsequent surgery between January 2008 and December 2014 in Breast Disease Center??Peking University First Hospital were analyzed retrospectively. Data of the pathological characteristics and events in follow-up were analyzed to explore the predicted factors and the prognostic value of pCR. Results The pCR rate was 21.9%??and the patients achieved a pCR had better survival than the patients who didn’t (DFS??P=0.003??OS??P=0.009). Different subtypes differed in pCR rate (P??0.001)??Luminal B-like(HER2 negative)??HER2 positive (non-luminal) and triple-negative breast cancer (TNBC) were easier to achieve a pCR (30.6%, 37.5% and 32.4% respectively). The predicted factors of pCR in the multivariate model are the PR status before NST(OR=0.297??95%CI??0.167-0.530??P??0.001????the HER2 status before NST(OR=2.351??95%CI=1.340-4.125??P??0.003????the Ki67 status before NST??OR=6.870??95%CI??0.885-53.303??P=0.065??. Conclusion The predicted factors of pCR are the PR??HER2 and Ki67 expression before NST. PCR could be a predictor of DFS and OS??but its values differ in subtypes??and the correlationships have statistical significance in HER2 positive (non-luminal) and TNBC.     

Trastuzumab in Primary Inflammatory Breast Cancer (IBC): High Pathological Response Rates and Improved Outcome

Abstract: Inflammatory breast cancer (IBC) represents a rare but aggressive and lethal form of locally advanced breast cancer (LABC) and frequently with HER‐2 neu overexpressed or amplified. We retrospectively identified 16 newly diagnosed HER‐2/neu‐positive IBC patients who were treated with preoperative trastuzumab. We determined the pathological complete response rate (pCR) when trastuzumab was added to preoperative chemotherapy in patients with HER2/neu‐positive IBC. Furthermore, we assessed the expression of CXCR4 in metastatic recurrence sites. Ten patients (62.5%) achieved a pCR. Six patients (37.5%) achieved a partial response. Median follow‐up of all patients was 24.2 months. Four (25%) patients have experienced a progression, of which three were in the brain. Two‐year progression‐free survival was 59.4% (95% CI 35–100). High expression of CXCR4 was detected in the brain metastases. We conclude that in spite of high pCR rates among women with HER‐2/neu‐positive IBC treated with neoadjuvant trastuzumab‐based regimens the outcome remains dismal and brain recurrences are frequent. CXCR4 may represent a novel therapeutic target.     

Neoadjuvant Chemotherapy of Breast Cancer: Tumor Markers as Predictors of Pathologic Response,Recurrence, and Survival

Abstract: This study reports the value of the tumor markers estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2) in predicting the response of breast cancer to neoadjuvant chemotherapy. A community cancer center prospectively maintained breast cancer database containing over 8,000 patient records was used. Since 1989, 464 patients were treated with neoadjuvant chemotherapy followed by surgical resection and were tested for ER and PR. Estrogen receptor and/or PR positive patients were considered hormone receptor (HR) positive. Human epidermal growth factor receptor 2 status was available on 368 patients. Total, breast, and nodal pathologic complete response (pCR) rates, recurrence, and overall survival were assessed. Total and breast pCR rates were higher in HR negative (HR?) patients (26% and 32%, respectively) than in HR positive (HR+) patients (4% and 7%, respectively; p < 0.001). Compared to HR+ patients, HR? patients had higher recurrence rates (38% versus 22%; p < 0.001), a shorter time to recurrence (1.28 versus 2.14 years; p < 0.001), and decreased overall survival (67% versus 81%; p < 0.001). Human epidermal growth factor receptor 2 positive patients treated with neoadjuvant trastuzumab (NAT) demonstrated higher total pCR (34% versus 13%; p = 0.008), breast pCR (37% versus 17%; p = 0.02), and nodal pCR rates (47% versus 23%; p = 0.05) compared to HER2+ patients not treated with NAT. Furthermore, HER2+ patients who received NAT had lower recurrence rates (5% versus 42%; p < 0.001) and increased overall survival (97% versus 68%; p < 0.001). In conclusion, breast cancer HR status is predictive of total and breast pCR rates after neoadjuvant chemotherapy. Although HR? patients derive greater benefit from neoadjuvant chemotherapy in terms of pathologic response, they have worse outcomes in terms of recurrence and survival. Hormone receptor positive patients demonstrate significantly less response to neoadjuvant chemotherapy, but significantly better overall outcome. For both HR? and HR+, addition of NAT for HER2+ tumors results in both a superior response and outcome.     

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目的对乳腺癌新辅助治疗疗效相关因素进行分析。方法选择2009年1月至2010年8月在北京大学第一医院乳腺疾病中心接受新辅助治疗的原发乳腺癌病人为研究对象,以蒽环类及紫杉类细胞毒药物为新辅助化疗基础方案,并对人类表皮生长因子受体2(HER2)阳性病人联合应用曲妥珠单抗。参照实体肿瘤疗效评价标准(RECIST1.1)及组织学分级系统(Miller and Payne grading system)对新辅助治疗疗效进行综合评价。结果共105例病人入组,动态增强MRI评价临床完全缓解(CR)12例(11.4%),部分缓解(PR)68例(64.8%),疾病稳定(SD)24例(22.9%),疾病进展(PD)1例(1.0%);组织分级系统评价:30例(28.6%)G5(病理完全缓解,pCR),35例(33.3%)G4,17例(16.2%)G3,12例(11.4%)G2,11例(10.5%)G1。单因素分析提示,肿瘤临床T分期和N分期较早,高组织学分级、Ki67、p53及HER2高表达与病理完全缓解率相关,且差异有统计学意义(P<0.01);而雌激素受体(ER)、孕激素受体(PR)及CK5/6在疗效评价中差异无统计学意义(P>0.05)。结论 T分期、N分期、组织学分级、HER2、Ki67、p53与新辅助治疗疗效具有相关性。     

HER2 positivity is not associated with adverse prognosis in high-risk estrogen receptor-positive early breast cancer patients treated with chemotherapy and trastuzumab

Co-expression of human epidermal growth factor receptor-2 (HER2) and hormone receptor (HR) predicted worse prognosis in early breast cancer before trastuzumab was developed. We aimed to investigate whether HER2 positivity was still associated with worse outcome in high-risk estrogen receptor (ER) positive patients treated with trastuzumab and chemotherapy. In the present study, 227 ER+/HER2+ patients treated with trastuzumab and chemotherapy (HER2-pos-T group) and 1097 ER+/HER2-patients treated with chemotherapy alone (HER2-neg group) during 2009 and 2015 were retrospectively enrolled for the comparison of disease-free survival (DFS) and overall survival (OS). At a median follow-up of 59 months, 174 DFS events and 69 deaths were observed. The estimated 5-year DFS rate was 94.2% in the HER2-pos-T group and 87.4% in the HER2-neg group (Log-rank P = 0.014). HER2-pos-T group was associated with significantly better DFS in multivariate analysis (HR 0.38, 95% CI: 0.22–0.67, Log-rank P = 0.001). The estimated 5-year OS rates for the two groups were 97.2% and 95.7%, respectively (Log-rank P = 0.183). In multivariable analysis, patients in the HER2-pos-T group had significantly better OS compared with those in the HER2-neg group (HR 0.40, 95% CI: 0.17–0.95, Log-rank P = 0.037). We concluded that high-risk ER+/HER2+ breast cancer patients treated with chemotherapy and trastuzumab had superior prognosis compared with ER+/HER2-patients. Therefore, HER2 positivity itself may not be considered as an unfavorable factor for ER + patients in the era of trastuzumab.     

Trastuzumab combined to neoadjuvant chemotherapy in patients with HER2-positive breast cancer: a systematic review and meta-analysis

Purpose

To perform a meta-analysis in order to quantify the actual cumulative randomized evidence for the benefit and toxicity of trastuzumab combined with neoadjuvant chemotherapy in HER2-positive breast cancer.

Methods

Potentially eligible trials were located through PubMed and Cochrane Library searches and abstracts of major international conferences. The endpoints that we assessed were pathologic complete response (pCR) rate, breast-conserving surgery (BCS) rate and toxicity.

Results

Five trials were identified with 515 eligible patients. The probability to achieve pCR was higher for the trastuzumab plus chemotherapy arm (RR 1.85, 95% CI: 1.39–2.46; p-value < 0.001). No significant difference in terms of breast-conserving surgery between the two treatment arms was observed (OR: 0.98, 95% CI: 0.80–1.19, p-value = 0.82). Regarding toxicity, the addition of trastuzumab did not increase the incidence of neutropenia, neutropenic fever, and cardiac adverse events.

Conclusion

The addition of trastuzumab in HER2-positive breast cancer in the neoadjuvant setting improves the probability of achieving higher pCR with no additional toxicity. Based on the available evidence, the use of trastuzumab combined with neoadjuvant chemothetherapy in patients with HER2-positive breast cancer seems to offer substantial benefit in terms of pCR.