ReviewBreast cancer research and treatment2024
Trends in HR+ metastatic breast cancer survival before and after CDK4/6 inhibitor introduction in the United States: a SEER registry analysis of patients with HER2- and HER2+ metastatic breast cancer.
Review 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 15 papers, 2 of them syntheses that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
15 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Palbociclib treatment in patients with HR+/HER2- advanced or metastatic breast cancer and visceral metastasis: A systematic literature review.Breast (Edinburgh, Scotland) · 2025Pooled it
- Real-world effectiveness and safety of CDK4/6i in elderly and BIPOC patients with HR+/HER2- advanced/metastatic breast cancer: an updated systematic literature review.Frontiers in oncology · 2025Pooled it
- A multicenter, randomized, open label, two formulation, crossover bioequivalence trial of doxorubicin hydrochloride liposomal injection in Chinese patients with metastatic breast cancer.Journal of cancer research and clinical oncology · 2025Trial
- Ten-year survival of women with invasive breast cancer by stage, molecular subtype, and grade combined: a population-based study.The oncologist · 2026Article
- Review
- Clinical benefit of palbociclib retreatment after abemaciclib exposure in hormone receptor positive, HER2 negative metastatic breast cancer.Scientific reports · 2026Article
- Effect of Primary Breast Surgery on Prognosis in Breast Cancer Patients Presenting with Isolated Bone Metastases.Cancers · 2026Article
- Real-world treatment patterns and sequencing in patients with advanced / metastatic HR+/HER2- breast cancer in Europe and the United States.Breast (Edinburgh, Scotland) · 2026Article
- Social Determinants of Health in Metastatic Breast Cancer Care: A Podcast Exploring Challenges and Opportunities in the United States and Canada.Oncology and therapy · 2026Article
- Clinical Efficacy and Security Analysis of CDK4/6 Inhibitors Combined with ET in Patients with HRCancer management and research · 2026Article
- A Decade After Approval of the First CDK4/6 Inhibitor: A Look Back at Palbociclib's Journey from Discovery to Approval and What's Next in CDK Inhibition in Breast Cancer.Targeted oncology · 2025Review
- Observational
- Relationship of Prior Anticancer Treatments with Palbociclib Clinical Outcomes in Patients with HRTargeted oncology · 2025Observational
- Overall Survival With Palbociclib and Aromatase Inhibitor Versus Aromatase Inhibitor Alone in Older Patients With HR+/HER2- Metastatic Breast Cancer.Cancer medicine · 2025Observational
- Conjugation with S4 protein transduction domain enhances the immunogenicity of the peptide vaccine against breast cancer.Molecular and clinical oncology · 2025Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeCyclin-dependent kinase 4/6 inhibitors (CDK4/6i) have improved patient survival in hormone receptor-positive/human epidermal growth factor receptor 2-negative (HR+/HER2-) metastatic breast cancer (mBC) in clinical trials and real-world studies. However, investigations of survival gains in broader HR+/HER2- mBC populations using epidemiological approaches are limited.
methodsThis retrospective study used SEER registry data to assess breast cancer-specific survival (BCSS) in patients diagnosed with HR+/HER2- de novo mBC from 2010 to 2019. Kaplan-Meier and Cox proportional hazards models were used to compare BCSS in patients diagnosed before (2010‒2013 with follow-up to 2014) and after (2015‒2018 with follow-up to 2019) the 2015 guideline recommendations for CDK4/6i use. A comparison was made to patients with HR+/HER2-positive (HER2+) de novo mBC, for which no major guideline changes occurred during 2015-2018.
resultsData from 11,467 women with HR+/HER2- mBC and 3260 women with HR+/HER2+ mBC were included. After baseline characteristic adjustment, patients with HR+/HER2- mBC diagnosed post-2015 (n = 6163), had an approximately 10% reduction in risk of BC-specific death compared with patients diagnosed pre-2015 (n = 5304; HR = 0.895, p < 0.0001). Conversely, no significant change was observed in HR+/HER2+ BCSS post-2015 (n = 1798) versus pre-2015 (n = 1462). Similar results were found in patients aged ≥ 65 years.
conclusionUsing one of the largest US population-based longitudinal cancer databases, significant improvements in BCSS were noted in patients with HR+/HER2- mBC post-2015 versus pre-2015, potentially due to the introduction of CDK4/6i post-2015. No significant improvement in BCSS was observed in patients with HR+/HER2+ mBC post-2015 versus pre-2015, likely due to the availability of HER2-directed therapies in both time periods.
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