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    BIOMARKER:

    HR positive

    i
    Other names: ESR1, Era, ESR, NR3A1, ER, ER beta, PGR, Progesterone receptor, Nuclear receptor subfamily 3 group C member 3, NR3C3
    Entrez ID:
    2099; 5241
    Related biomarkers:
    Expression
    Mutation
    CNA
    Fusion
    Others
    Related tests:
    1d
    Phase III Study to Assess AZD9833+ CDK4/6 Inhibitor in HR+/HER2-MBC With Detectable ESR1m Before Progression (SERENA-6) (clinicaltrials.gov)
    P3, N=315, Active, not recruiting, AstraZeneca | Trial completion date: Nov 2027 --> Sep 2028
    Trial completion date • Circulating tumor DNA
    |
    HER-2 (Human epidermal growth factor receptor 2) • ER (Estrogen receptor)
    |
    ER positive • HR positive • HER-2 negative • ESR1 mutation • HR positive + HER-2 negative • HER-2 negative + ER positive • HER-2 negative + ER positive + ESR1 mutation • HER-2 negative + HR positive + ESR1 mutation
    |
    Guardant360® CDx
    |
    Ibrance (palbociclib) • Verzenio (abemaciclib) • Kisqali (ribociclib) • letrozole • anastrozole • camizestrant (AZD9833)
    1d
    AMBITION: A Phase III Study of Bevacizumab and Paclitaxel in Combination With Atezolizumab as a Treatment for Locally Advanced Unresectable or Metastatic Hormone Receptor-positive HER2 Negative Breast Cancer (clinicaltrials.gov)
    P3, N=281, Completed, Japanese Foundation for Cancer Research | Trial completion date: Sep 2025 --> Mar 2026 | Active, not recruiting --> Completed
    Trial completion • Trial completion date
    |
    HER-2 (Human epidermal growth factor receptor 2) • PD-L1 (Programmed death ligand 1)
    |
    HR positive • HER-2 negative
    |
    Avastin (bevacizumab) • Tecentriq (atezolizumab) • paclitaxel
    1d
    Neoadjuvant Pembrolizumab + Decitabine Followed by Std Neoadj Chemo for Locally Advanced HER2- Breast Ca (clinicaltrials.gov)
    P2, N=46, Active, not recruiting, Virginia Commonwealth University | Trial completion date: Mar 2026 --> Mar 2027
    Trial completion date • Checkpoint inhibition • IO biomarker
    |
    HER-2 (Human epidermal growth factor receptor 2) • PD-L1 (Programmed death ligand 1) • ER (Estrogen receptor) • PGR (Progesterone receptor)
    |
    HR positive • HER-2 negative • HR negative • HER-2 negative + HR negative
    |
    Keytruda (pembrolizumab) • carboplatin • doxorubicin hydrochloride • albumin-bound paclitaxel • cyclophosphamide • decitabine
    1d
    ADAPTela: Marker - Adjusted Therapy Comparing Adjuvant Elacestrant With Standard Endocrine Treatment in Genomically and/or Clinically High-risk ER+/HER2- eBC (clinicaltrials.gov)
    P3, N=1520, Not yet recruiting, West German Study Group | N=1050 --> 1520
    Enrollment change
    |
    HER-2 (Human epidermal growth factor receptor 2) • ER (Estrogen receptor) • PGR (Progesterone receptor) • CDK4 (Cyclin-dependent kinase 4)
    |
    ER positive • HR positive • HER-2 negative • HER-2 negative + ER positive
    |
    MammaPrint® • Oncotype DX Breast Recurrence Score®Test
    |
    Kisqali (ribociclib) • Orserdu (elacestrant)
    2d
    A Rare Case of Palbociclib-Induced Pancolitis: Clinical Insights and Literature Review. (PubMed, Cureus)
    While generally well tolerated, their toxicity profiles differ, with palbociclib and ribociclib more commonly associated with hematologic toxicity and abemaciclib with gastrointestinal adverse effects such as diarrhea...We report a 65-year-old woman with metastatic HR+ breast cancer who presented with a two-week history of watery diarrhea (10-12 episodes/day), abdominal cramping, and a 5-pound weight loss while receiving palbociclib, fulvestrant, and denosumab...Although biopsy later demonstrated cytomegalovirus (CMV) positivity, antiviral therapy was deferred given negative CMV PCR and complete clinical resolution. This case highlights an uncommon presentation of palbociclib-induced pancolitis and underscores the importance of careful clinical evaluation and contextual interpretation of histologic findings to avoid unnecessary treatment.
    Journal
    |
    HER-2 (Human epidermal growth factor receptor 2)
    |
    HR positive • HER-2 negative
    |
    Ibrance (palbociclib) • Verzenio (abemaciclib) • Kisqali (ribociclib) • fulvestrant • Prolia (denosumab)
    2d
    Effects of Physical Activity in Early Stage Hormone Receptor Positive Breast Cancer Patients (clinicaltrials.gov)
    P=N/A, N=44, Recruiting, Centro di Riferimento Oncologico - Aviano
    New trial
    |
    HR positive
    2d
    2025-370: A Multicohort Study of Toripalimab in Combination With Investigator-Selected Chemotherapy for Advanced HER2-Negative Breast Cancer (clinicaltrials.gov)
    P2, N=92, Recruiting, Henan Cancer Hospital
    New P2 trial
    |
    HER-2 (Human epidermal growth factor receptor 2)
    |
    HR positive • HER-2 negative
    |
    Loqtorzi (toripalimab-tpzi)
    2d
    Brain Radiotherapy Combined With Dalpiciclib and Endocrine Therapy in HR-Positive/HER2-Negative Advanced Breast Cancer With Brain Metastases (clinicaltrials.gov)
    P2, N=46, Not yet recruiting, Nanfang Hospital, Southern Medical University
    New P2 trial
    |
    HER-2 (Human epidermal growth factor receptor 2) • ER (Estrogen receptor) • PGR (Progesterone receptor)
    |
    ER positive • HR positive • HER-2 negative • HER-2 negative + AR positive + ER positive • HER-2 negative + ER positive
    |
    AiRuiKang (dalpiciclib)
    4d
    Background parenchymal enhancement as a predictor of invasive disease-free survival in hormone receptor-positive, HER2-negative breast cancer. (PubMed, Eur J Radiol)
    Therefore, the lack of details regarding the timing of the MRI and possible treatment effects constitutes a limiting factor in terms of the internal validity of the model and the clinical interpretation of the findings. Additionally, although almost all patients (99.8%) in the study were reported to have received endocrine therapy, establishing a relationship between BPE and BPE based on the type or response to treatment could strengthenthe study.
    Journal
    |
    HER-2 (Human epidermal growth factor receptor 2)
    |
    HR positive • HER-2 negative • HR positive + HER-2 negative
    |
    Oncotype DX Breast Recurrence Score®Test
    4d
    Combined ypT0 and ycN0 for Risk Stratification of ypN0 in Clinically Node-Positive Breast Cancer After Neoadjuvant Chemotherapy: A Multicenter Cohort Study. (PubMed, Clin Breast Cancer)
    A combination of ypT, ycN, and HR/HER2 status was strongly associated with ypN0 in patients with cN+ breast cancer. These findings represent a bridging study supporting risk stratification and the design of future trials evaluating axillary surgery omission.
    Journal
    |
    HER-2 (Human epidermal growth factor receptor 2)
    |
    HER-2 positive • HR positive • HER-2 negative • HR positive + HER-2 positive • HER-2 negative + HR negative
    5d
    Synchronous Bilateral Breast Invasive Ductal Carcinoma With Osteoclast-Like Stromal Giant Cells in a 44-Year-Old Woman: A Case Report. (PubMed, Cureus)
    This report highlights an extremely rare, pathologically confirmed case of synchronous bilateral primary breast carcinoma with OCGCs. The presence of OCGCs in both invasive and in situ components suggests that their formation can be induced at early stages of tumor development, likely reflecting a distinct immune-reactive tumor microenvironment driven by host-related factors.
    Journal • BRCA Biomarker
    |
    HER-2 (Human epidermal growth factor receptor 2) • BRCA1 (Breast cancer 1, early onset) • BRCA2 (Breast cancer 2, early onset) • CD68 (CD68 Molecule)
    |
    HR positive • HER-2 negative
    5d
    Comparative real-world Progression Free Survival of CDK4/6 Inhibitors in HR+/HER2- Breast Cancer Patients with Bone Metastases. (PubMed, Oncologist)
    Ribociclib and abemaciclib may provide superior rwPFS and OS compared to palbociclib in HR+/HER2- mBC patients with bone metastases..
    Journal • Real-world evidence
    |
    HER-2 (Human epidermal growth factor receptor 2)
    |
    HR positive • HER-2 negative • HR positive + HER-2 negative
    |
    Ibrance (palbociclib) • Verzenio (abemaciclib) • Kisqali (ribociclib)