[Efficacy and survival outcomes of dose-dense carboplatin plus paclitaxel as neoadjuvant chemotherapy for triple-negative breast cancer].

Objective: To evaluate the efficacy and survival outcomes of dose-dense (biweekly) carboplatin plus paclitaxel (PC) as neoadjuvant chemotherapy (NAC) in triple-negative breast cancer (TNBC), and to explore an optimal neoadjuvant chemotherapy regimen for TNBC. Methods: Patients diagnosed as TNBC(cT1-4N0-3M0) in Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College Between January 2008 and September 2018 who received dose-dense PC and standard 3-weekly PC as NAC were 1∶1 matched using propensity score matching (PSM) to compare the efficacy, safety and survival outcomes. Results: One hundred of TNBC patients were enrolled (50 patients were divided in dose-dense group, 50 patients in standard group). The objective response rate (ORR) of dose-dense group and standard group were both 90.0% (45/50). The grade 3-4 neutropenia in dose-dense group was less than that of standard group (32.7% vs. 68.0%, P=0.001), while the rate of ALT/AST elevation in dose-dense group was higher than that of standard group (57.1% vs. 32.0%, P=0.012). The pathological complete response (pCR) rates were 34.0% (17/50) in dose-dense group and 38.0% (19/50) in standard group, without statistically significance (P=0.677). The median follow-up time was 55 months (3-150 months). The 5-year recurrence-free survival (RFS) in dose-dense group and standard group were 83.5% and 75.2%, respectively the 5-year overall survival (OS) in dose-dense and standard group were 87.9% and 84.5% the difference were not statistically significant (P=0.322 and 0.647, respectively). Patients with residual disease (tumor size≥1 cm or lymph node positive) had poor prognosis, the 5-year RFS and OS were 59.3% and 68.5%, respectively. Conclusions: Dose-dense PC has similar efficacy with standard 3-weekly PC and has a good safety profile. Since dose-dense regimen can shorten the duration of therapy, it can be an alternative in TNBC.目的： 评价PC(紫杉醇+卡铂)密集方案新辅助治疗三阴性乳腺癌的疗效和远期生存，探索三阴性乳腺癌新辅助化疗的优化方案。 方法： 2008年1月至2018年9月中国医学科学院肿瘤医院病理确诊为三阴性乳腺癌(临床分期T1~4N0~3M0)、接受PC密集方案新辅助化疗及手术的患者，采用倾向性评分方法对PC密集方案组和3周方案组患者进行1∶1最近邻匹配，比较两组的疗效、安全性及远期生存。 结果： 纳入三阴性乳腺癌患者100例，密集方案组和3周方案组各50例。密集方案组和3周方案组的客观有效率(ORR)均为90.0%(45/50)。密集方案组3~4级中性粒细胞减少的发生率低于3周方案组(分别为32.7%和68.0%，P＝0.001)，但肝功能异常的发生率高于3周方案组(分别为57.1%和32.0%，P＝0.012)。病理学完全缓解(pCR)率分别为34.0%(17/50)和38.0%(19/50)，差异无统计学意义(P＝0.677)。中位随访55个月，密集方案组和3周方案组的5年无复发生存率分别为83.5%和75.2%，5年总生存率分别为87.9%和84.5%，差异均无统计学意义(P值分别为0.322和0.647)。术后病理有明显残留病灶(肿瘤最大径≥1 cm或淋巴结阳性)者预后不良，5年无复发生存率和总生存率分别为59.3%和68.5%。 结论： PC密集方案与常规3周方案新辅助治疗三阴性乳腺癌疗效相似，患者耐受性良好，且能缩短治疗时间，是三阴性乳腺癌新辅助化疗的可选方案。.