ArticleNPJ breast cancer2025
Predictors of response to neoadjuvant chemo-immunotherapy in metaplastic triple-negative breast cancer.
Article in NPJ breast cancer, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
4 citing papers in PubMed.
- Efficacy of perioperative pembrolizumab for triple-negative breast cancer with apocrine feature or metaplastic carcinoma.The oncologist · 2026Article
- Spindle Cell (Metaplastic) Carcinoma of the Breast Showing No Clinical Benefit with Pembrolizumab-Based Neoadjuvant Chemoimmunotherapy.Surgical case reports · 2026Article
- Case Report: Spindle cell metaplastic breast carcinoma.Frontiers in oncology · 2026Article
- Case Report: Triple-negative metaplastic breast carcinoma with primary resistance to neoadjuvant chemoimmunotherapy, refractory tumor necrosis-related fever, and rapid postoperative disease progression.Frontiers in oncology · 2026Article
Corrections and comments
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Authors and funding
16 authors.
Funding
Abstract
Metaplastic breast cancer (MpBC) treated with standard chemotherapy has low rates of complete pathological response (pCR)(2-23%). In this study, we evaluate the response to neoadjuvant chemo-immunotherapy (NACI) in early-stage MpBC. Thirty-two stage I-III MpBC patients treated with NACI (KEYNOTE-522 regimen) were prospectively enrolled in an institutional rare tumor program. All MpBC were triple negative; most were of chondromyxoid/matrix-producing (12/32, 38%). The majority had stage II (78%) tumors, 12/32 (37.5%) patients completed NACI, 11/32 (34%) progressed during NACI, and in the remaining 9, NACI was discontinued due to side effects. The pCR rate in the entire cohort was 22% (7/32) and it was statistically higher (5/8, 62%) among patients with high ( ≥ 60%) stromal tumor-infiltrating lymphocytes (sTILs) as compared to patients with < 60% sTILs (1/11, 9%). Most patients received adjuvant systemic therapy (capecitabine 16/32, pembrolizumab 20/32). At a median follow-up of 13 months, there were a total of 2 local recurrences, 10 distant recurrences, and 7 deaths. We demonstrated a modest pCR rate in MpBC with the addition of pembrolizumab (22%). Nonetheless, amongst patients with high sTILs, high pCR rates-comparable to those in the KEYNOTE-522 trial-were observed. These findings suggest that sTILs can be used to triage MpBC patients for NACI.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.