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Actively Recruiting

Phase 3
Age: 18Years +
All Genders
ID06492616

Comparing Elacestrant to Standard Endocrine Therapy in Adults With Node-Positive, ER-Positive, HER2-Negative Early Breast Cancer at High Risk of Recurrence

Led by Stemline Therapeutics, Inc. · Updated on 2026-07-08

4220

Participants Needed

555

Research Sites

165 weeks

Total Duration

On this page

AI-Summary

What this Trial Is About

Researchers are evaluating elacestrant compared to standard endocrine therapies in adults with node-positive, Estrogen Receptor-positive ER, HER2-negative early breast cancer who are at high risk of cancer returning. The study focuses on those who have had prior endocrine therapy and aims to measure how well elacestrant may prevent invasive breast cancer recurrence over five years. Participants are randomly assigned to receive either 345 mg of elacestrant daily for five years or continue their prior standard endocrine therapy, which may include an aromatase inhibitor anastrozole, letrozole, or exemestane or tamoxifen. The trial is open-label, meaning both participants and researchers know which treatment is given. During the study, participants will have regular assessments to monitor cancer recurrence, survival, side effects, and quality of life. Evaluations include questionnaires on health status and physical functioning at baseline, six months, and annually for up to five years. Safety is tracked through adverse event reporting up to five years plus 28 days. The total participation duration can last up to five years with ongoing monitoring and data collection.

CONDITIONS

Brief Title

A Study of Elacestrant Versus Standard Endocrine Therapy in Women and Men With ER+,HER2-, Early Breast Cancer With High Risk of Recurrence

Who Can Participate

Age: 18Years +
All Genders

Eligibility Criteria

Eligible

You may qualify if you...

  • Adults 18 years or older
  • Histologically or cytologically confirmed ER-positive (≥10% by immunohistochemistry) and HER2-negative early stage invasive breast cancer
  • Node-positive breast cancer at high risk of recurrence
  • Early stage resected invasive breast cancer without signs of recurrence or distant metastases
  • Received at least 24 months but not more than 60 months of endocrine therapy (aromatase inhibitors or tamoxifen), with or without CDK4/6 inhibitors
  • Completed or discontinued prior CDK4/6 or PARP inhibitor treatments before enrollment
Not Eligible

You will not qualify if you...

  • Diagnosis of inflammatory breast cancer
  • History of prior invasive breast cancer in either breast
  • History of any other malignancy within 3 years before randomization, except treated basal or squamous cell skin cancer, superficial bladder cancer, or carcinoma in situ of the cervix
  • More than 6 months interruption of prior standard adjuvant endocrine therapy or off therapy for more than 6 months before randomization
  • Other protocol-specified exclusion criteria may apply

Research Team

S

Stemline Trials

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