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Phase III Randomized, Placebo-Controlled Clinical Trial Evaluating the Use of Adjuvant Endocrine Therapy +/- One Year of Everolimus in Patients With High-Risk, Hormone Receptor-Positive and HER2/Neu Negative Breast Cancer
- To compare whether the addition of one year of everolimus (10 mg daily) to standard adjuvant endocrine therapy improves invasive disease-free survival (IDFS) in patients with high-risk, hormone-receptor (HR)-positive, and human epidermal growth factor receptor (HER)2-negative breast cancer.
- To compare whether the addition of one year of everolimus to standard adjuvant endocrine therapy improves overall survival (OS) and distant recurrence-free survival (DRFS) in this patient population.
- To evaluate the safety, toxicities, and tolerability of one year of everolimus in combination with standard adjuvant endocrine therapy and to compare it with standard adjuvant endocrine therapy plus placebo in this patient population.
- To determine whether the benefit of one year of everolimus use in addition to standard adjuvant endocrine therapy varies by recurrence score (RS), nodal status, or other commonly used prognostic factors.
- To evaluate adherence to 1-year treatment of everolimus in comparison to placebo in addition to standard adjuvant endocrine therapy in this patient population.
- To collect specimens in order to evaluate biomarkers of therapeutic efficacy. (exploratory)
- Arm I: Patients receive an approved endocrine therapy comprising tamoxifen citrate*, goserelin acetate** or leuprolide acetate**, or aromatase inhibitor (anastrozole, letrozole, or exemestane) for 2-5 years. Patients also receive a placebo orally (PO) daily for 1 year in the absence of disease progression or unacceptable toxicity.
- Arm II: Patients receive an approved endocrine therapy regimen as in arm I. Patients also receive everolimus PO daily for 1 year in the absence of disease progression or unacceptable toxicity.
- Patients must have a histologically confirmed diagnosis of invasive breast carcinoma with positive estrogen (ER)- and/or progesterone-receptor (PR) status, and negative human epidermal growth factor receptor (HER)2, for whom standard adjuvant endocrine therapy is planned.
- Patients must not have metastatic breast cancer (stage IV disease); patients with multifocal, multicentric, and synchronous bilateral, and primary inflammatory breast cancers are allowed.
- Patients must be high risk.
- Patients must have completed either breast-conserving surgery or total mastectomy, with negative margins and appropriate axillary staging; a negative margin is defined as no evidence of tumor or ductal carcinoma in situ (DCIS) at the line of resection; additional operative procedures may be performed to obtain clear margins.
- Patients must have undergone axillary staging by sentinel-node biopsy or axillary lymph node dissection (ALND).