ArticleBreast cancer (Tokyo, Japan)2025
Efficacy and feasibility of neoadjuvant pembrolizumab plus chemotherapy for early-stage triple-negative and estrogen receptor low, HER2-negative breast cancer: a Japanese single-institution real-world study.
Article in Breast cancer (Tokyo, Japan), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 1 of them a synthesis that pooled it.
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Who cites it
6 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Association between endocrine therapy and survival outcomes in estrogen receptor-low breast cancer: a systematic review and meta-analysis.The oncologist · 2026Pooled it
- Efficacy of perioperative pembrolizumab for triple-negative breast cancer with apocrine feature or metaplastic carcinoma.The oncologist · 2026Article
- Real-world outcome of neoadjuvant therapy with or without pembrolizumab for triple-negative breast cancer.Acta oncologica (Stockholm, Sweden) · 2026Article
- The role of AI-driven decision support in immunotherapy for predicting pathological complete response in triple-negative breast cancer.Frontiers in oncology · 2026Article
- Pathological response to pembrolizumab-based neoadjuvant therapy in ER-low vs. ER-zero breast cancer: a Swedish population-based cohort study.Breast cancer research : BCR · 2025Article
- Treatment toxicities and pathological response through the evolution of neoadjuvant regimens in early triple-negative breast cancer.ESMO real world data and digital oncology · 2025Article
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16 authors.
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Abstract
backgroundNeoadjuvant pembrolizumab plus chemotherapy and adjuvant pembrolizumab have been established as the optimal systemic therapies for patients with early stage triple-negative breast cancer (TNBC); however, their efficacy and feasibility in the Japanese population remain unexplored.
methodsThis study included patients with early stage TNBC or low estrogen receptor (ER) positivity (1-9%) with human epidermal growth factor receptor type 2- (HER2-) negative breast cancer who received neoadjuvant pembrolizumab plus chemotherapy from October 2022 at Cancer Institute Hospital of Japanese Foundation for Cancer Research. Information regarding clinicopathological features, systemic therapy, treatment outcomes, and adverse events of patients who underwent surgery by February 2024 was retrospectively collected.
resultsOverall, 69 patients received neoadjuvant pembrolizumab plus carboplatin and paclitaxel therapy, and 46 underwent surgery by February 2024. The median age of the patients was 53.5 years, and 80.4% and 19.6% had stage II and III disease, respectively. TNBC and ER-low HER2-negative breast cancer accounted for 82.6% and 17.4% cases, respectively. Overall pathological complete response rate was 56.5%, with 87.5% in patients with ER-low HER2-negative tumors. The completion rates for neoadjuvant pembrolizumab, chemotherapy, and pembrolizumab plus chemotherapy were 65.2%, 56.5%, and 52.2%, respectively. Furthermore, 80.4% and 15.2% of patients experienced grade 3 or higher treatment-related adverse events and immune-related adverse events, respectively, and 34% experienced unexpected hospitalization during neoadjuvant treatment.
conclusionsThe efficacy and safety profiles of neoadjuvant pembrolizumab plus chemotherapy in the Japanese population are consistent with previous reports. This regimen may have therapeutic potential against ER-low HER2-negative tumors and TNBC.
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