ArticleArchives of pathology & laboratory medicine2021
Triple-Positive Breast Carcinoma: Histopathologic Features and Response to Neoadjuvant Chemotherapy.
Article in Archives of pathology & laboratory medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 9 citations in OpenAlex.
- Alterations in immune cell phenotype and cytotoxic capacity in HER2+ breast cancer patients receiving HER2-targeted neo-adjuvant therapy.British journal of cancer · 2023Trial
- Article
- Optimizing neoadjuvant treatment in HER2-positive breast cancer: the role of HER2, HR, PD-L1 expression and regimen selection.Future oncology (London, England) · 2025Article
- Article
- Stratification of Tamoxifen Synergistic Combinations for the Treatment of ER+ Breast Cancer.Cancers · 2023Article
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Authors and funding
7 authors at 1 institution in 1 country.
Funding
Abstract
CONTEXT.—: It is unclear whether HER2+ tumors expressing both estrogen receptor (ER) and progesterone receptor (PR), that is, triple-positive breast carcinomas (TPBCs), show unique morphologic and clinical features and response to neoadjuvant chemotherapy (NAC). OBJECTIVE.—: To study the morphologic and immunohistochemical features of TPBCs from patients who underwent NAC. DESIGN.—: We retrospectively reviewed core biopsy and post-NAC slides of 85 TPBCs. H-scores were calculated for ER and PR. HER2 slides and fluorescence in situ hybridization (FISH) reports were reviewed. Residual cancer burden was calculated for post-NAC specimens. RESULTS.—: Eighty-one of the 85 tumors (95.3%) showed ductal histology, 3 (3.5%) were invasive lobular carcinomas, and 1 (1.2%) showed mixed ductal and lobular features. A subset showed mucinous (n = 7, 8.2%), apocrine (n = 5, 5.9%), and/or micropapillary (n = 4, 4.7%) differentiation. Fifty-four TPBCs (63.5%) showed high ER expression (H-score >200), including 27 (31.8%) with high expression of ER and PR. Fifty-two tumors (61.1%) showed HER2 3+ staining. Mean HER2/CEP17 ratio by FISH was 3.6 (range, 2-12.2) and mean HER2 signals per cell was 8 (range, 3.7-30.4). Pathologic complete response (pCR) rate was 35.3% (30 of 85). HER2 3+ staining was the only significant predictor of pCR on multivariate analysis (odds ratio = 9.215; 95% CI, 2.401-35.371; P < .001). The ER/PR expression did not correlate with response to therapy. CONCLUSIONS.—: TPBCs are heterogeneous with some showing mucinous, lobular, or micropapillary differentiation. The pCR rate of TPBCs is similar to that reported for ER+/PR-/HER2+ tumors. HER2 overexpression by IHC was associated with significantly better response to therapy and may help select patients for treatment in the neoadjuvant setting.
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