ArticleBreast cancer research and treatment2024
Correlation between breast cancer subtypes determined by immunohistochemistry and n-COUNTER PAM50 assay: a real-world study.
Article in Breast cancer research and treatment, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed.
- Comparison of a Novel MRNA-Based Breast Cancer Subtyping Assay with PAM50 and Oncotype DX in Estrogen Receptor-Positive/HER2-Negative Breast Cancer: An Exploratory Age-Stratified Retrospective Cohort Study.Current issues in molecular biology · 2026Article
- From Luminal to Triple Negative: 3D Spheroids Reveal Molecular and Phenotypic Differences Across Breast Cancer Subtypes.International journal of molecular sciences · 2026Article
- Prostate-Specific Membrane Antigen (PSMA): A Potential Theranostic Biomarker in Breast Cancer.Biomedicines · 2026Article
- Comment on "Prognostic Importance of PTEN and P53 in Aggressive Luminal A Subtype Breast Cancers".European journal of breast health · 2025Article
- Pathological complete response and survival outcomes in single hormone receptor-positive/HER2-negative breast cancer after neoadjuvant chemotherapy and its intrinsic biological features and immune landscape.Breast cancer research and treatment · 2025Article
- Integrated spatial proteomic analysis of breast cancer heterogeneity unravels cancer cell phenotypic plasticity.Nature communications · 2025Article
- Translating genomic insights into therapy: an NGS-based mutation profiling study in breast cancer.Medical oncology (Northwood, London, England) · 2025Article
- Article
- Cancer Cell Line Classification Using Raman Spectroscopy of Cancer-Derived Exosomes and Machine Learning.Analytical chemistry · 2025Article
- Non-Luminal Disease Score for Everolimus in Patients with Hormone Receptor‑positive and Human Epidermal Growth Factor Receptor 2-Negative Advanced Breast Cancer: A Multicenter and Retrospective Study.Breast cancer (Dove Medical Press) · 2025Article
- Article
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22 authors.
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Abstract
purposeMolecular subtyping based on gene expression profiling (i.e., PAM50 assay) aids in determining the prognosis and treatment of breast cancer (BC), particularly in hormone receptor (HR)-positive/human epidermal growth factor receptor 2 (HER2)-negative tumors, where luminal A and B subtypes have different prognoses and treatments. Several surrogate classifications have been proposed for distinguishing between the luminal A and B subtypes. This study determines the accuracy of local immunohistochemistry (IHC) techniques for classifying HR-positive/HER2-negative (HR+/HER2-) tumors according to intrinsic subtypes using the nCOUNTER PAM50 assay as reference and the HR status definition according the ASCO/CAP recommendations.
methodsMolecular subtypes resulting from nCOUNTER PAM50 performed in our laboratory between 2014 and 2020 were correlated with three different proxy surrogates proposed in the literature based on ER, PR, HER2, and Ki67 expression with different cut-off values. Concordance was measured using the level of agreement and kappa statistics.
resultsFrom 1049 samples with the nCOUNTER test, 679 and 350 were luminal A and B subtypes, respectively. Only a poor-to-fair correlation was observed between the three proxy surrogates and real genomic subtypes as determined by nCOUNTER PAM50. Moreover, 5-11% and 18-36% of the nCOUNTER PAM50 luminal B and A tumors were classified as luminal A and B, respectively, by these surrogates.
conclusionThe concordance between luminal subtypes determined by three different IHC-based classifiers and the nCOUNTER PAM50 assay was suboptimal. Thus, a significant proportion of luminal A and B tumors as determined by the surrogate classifiers could be undertreated or over-treated.
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