ArticleBreast cancer research and treatment2021
Concordance of the 21-gene assay between core needle biopsy and resection specimens in early breast cancer patients.
Article in Breast cancer research and treatment, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.
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Who cites it
16 citing papers in PubMed, 1 synthesis or guideline pooled it, 18 citations in OpenAlex.
- Guidance for Canadian Breast Cancer Practice: National Consensus Recommendations for the Systemic Treatment of Patients with HR+/HER2- Early Breast Cancer 2025.Current oncology (Toronto, Ont.) · 2026Guideline
- High concordance of 70-gene recurrence risk signature and 80-gene molecular subtyping signature between core needle biopsy and surgical resection specimens in early-stage breast cancer.Journal of surgical oncology · 2022Trial
- Article
- Feasibility, reliability, and clinical value of genomic assay on pre-therapeutic biopsy for endocrine receptor-positive HER2-negative early breast cancer.Frontiers in oncology · 2026Review
- Concordance of Oncotype DX Breast Recurrence Score Assay Results Between Paired Core Needle Biopsy and Surgical Excision Specimens in Hormone Receptor Positive, Human Epidermal Growth Factor Receptor 2 Negative, Early-Stage Breast Cancer.JCO precision oncology · 2025Article
- De-escalated neoadjuvant nab-paclitaxel combined with pyrotinib and trastuzumab in intrinsic HER2-enriched breast cancer (NJMU-BC01): a multicenter, single-arm, phase 2 trial.EClinicalMedicine · 2025Article
- Gene Expression Signatures for Guiding Initial Therapy in ER+/HER2- Early Breast Cancer.Cancers · 2025Review
- Article
- Anatomy Versus Biology: What Guides Chemotherapy Decisions in Older Patients With Breast Cancer?The Journal of surgical research · 2024Article
- A global sensitivity analysis of a mechanistic model of neoadjuvant chemotherapy for triple negative breast cancer constrained by in vitro and in vivo imaging data.Engineering with computers · 2024Article
- Evaluation of multigene assays as predictors for response to neoadjuvant chemotherapy in early-stage breast cancer patients.NPJ breast cancer · 2023Article
- PROCURE European consensus on breast cancer multigene signatures in early breast cancer management.NPJ breast cancer · 2023Article
- Invasive Breast Cancer with HER2 ≥4.0 and <6.0: Risk Classification and Molecular Typing by a 21-Gene Expression Assay and MammaPrint Plus BluePrint Testing.Breast cancer (Dove Medical Press) · 2023Article
- Article
- The prevalence and predictors of adjuvant chemotherapy use among patients treated with neoadjuvant endocrine therapy.Breast cancer research and treatment · 2022Article
- Ki-67 and breast cancer prognosis: does it matter if Ki-67 level is examined using preoperative biopsy or postoperative specimen?Breast cancer research and treatment · 2022Article
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Authors and funding
8 authors at 1 institution in 1 country.
Funding
Abstract
backgroundAdjuvant therapy decisions may be partly based on the results of a multigene quantitative reverse transcription-polymerase chain reaction (RT-PCR)-based assay: the 21-gene recurrence score (RS) test of resection specimens. When necessary, core needle biopsy (CNB) may be considered as a surrogate. Here, we evaluated the concordance in gene expression according to results from RT-PCR-based RS testing between paired CNBs and resection specimens.
methodsCNBs and resection specimens from 50 breast cancer (BC) patients were tested to calculate RSs. First, we examined the concordance of the ER, PR and HER-2 status of tissue samples indicated by immunohistochemical (IHC) and RT-PCR analyses. Then, we compared the IHC findings of ER, PR, HER-2 and Ki-67 staining across paired samples. Ultimately, the RS and single-gene results for ER, PR, HER-2 and Ki-67 were explored between paired samples.
resultsThe concordance between IHC and RT-PCR was 100%, 80.0% and 100% for ER, PR and HER-2, respectively, in both resection specimens and CNBs. The concordance for IHC ER, PR, HER-2 and Ki-67 status was 100%, 94.0%, 52.0% and 82.0%, respectively, between paired samples. RS results from paired samples showed a strong correlation. The overall concordance in RS group classification between samples was 74%, 72% and 78% based on traditional cutoffs, TAILORx cutoffs and ASCO guidelines, respectively. ER, PR, HER-2 and Ki-67 were modestly- to- strongly correlated between paired samples according to the RT-PCR results.
conclusionA modest- to- strong correlation of ER, PR, HER-2 and Ki-67 gene expression and RS between CNBs and resection specimens was observed in the present study. The 21-gene RS test could be reliably performed on CNBs. ER, PR and HER-2 status showed remarkable concordance between the IHC and RT-PCR analyses. The concordance between paired samples was high for the IHC ER, PR and Ki-67 results and low for HER-2.
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