Testing Whether Hormone Therapy With Ribociclib is as Effective as Chemotherapy Followed by Hormone Therapy With Ribociclib for the Treatment of High Anatomic Stage Breast Cancer With Low Recurrence Risk, The RxFINE-Low Trial

Conditions

• Anatomic Stage II Breast Cancer AJCC v8
• Anatomic Stage IIIA Breast Cancer AJCC v8
• Anatomic Stage IIIC Breast Cancer AJCC v8
• Estrogen Receptor-Positive Breast Carcinoma
• HER2-Negative Breast Carcinoma

Eligibility Criteria

Sex

ALL

Age

18 Years - N/A

Healthy Volunteers

Not accepted

Interventions

• Anastrozole — DRUG
  Given PO
• Biospecimen Collection — PROCEDURE
  Undergo blood sample collection
• Bone Scan — PROCEDURE
  Undergo bone scan
• Chemotherapy — DRUG
  Receive standard of care chemotherapy
• Computed Tomography — PROCEDURE
  Undergo CT scan
• Exemestane — DRUG
  Given PO
• Letrozole — DRUG
  Given PO
• Oncotype DX Breast Cancer Assay — PROCEDURE
  Undergo risk recurrence testing
• Positron Emission Tomography — PROCEDURE
  Undergo FDG PET scan
• Ribociclib Succinate — DRUG
  Given PO

Study Details

This phase III trial compares standard of care hormone therapy plus ribociclib to chemotherapy followed by hormone therapy plus ribociclib for the treatment of patients with high anatomic stage breast cancer with low risk of the cancer returning (low risk recurrence). Ribociclib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Hormone therapy, with letrozole, anastrozole or exemestane, lowers the amount of estrogen made by the body. This may help stop the growth of tumor cells that need estrogen to grow. Chemotherapy drugs work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Hormone therapy plus ribociclib may work as well as chemotherapy followed by hormone therapy plus ribociclib for the treatment of high anatomic stage breast cancer with low recurrence risk.

Key Dates

First listed

Feb 6, 2026

Start date

Aug 10, 2026

Status verified

Aug 2026

Primary completion

Jul 31, 2029

Completion

Jul 31, 2029

Study Design

Enrollment

1,978 participants (estimated)

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Arms

• Active Comparator: Arm A (chemotherapy, hormone therapy, ribociclib)
  Patients receive their physician's choice of standard of care chemotherapy. Patients then receive their physician's choice of standard of care hormone therapy with letrozole, anastrozole, or exemestane PO QD on days 1-28 of each cycle, as well as ribociclib PO QD on days 1-21 of each cycle. Cycles repeat every 28 days for at least 60 months for hormone therapy and up to 3 years for ribociclib, in the absence of disease progression or unacceptable toxicity. Patients also undergo CT scan, bone scan, or FDG PET-CT scan and may optionally undergo blood sample collection throughout the study.
• Experimental: Arm B (hormone therapy, ribociclib)
  Patients receive their physician's choice of standard of care hormone therapy with letrozole, anastrozole, or exemestane PO QD on days 1-28 of each cycle and ribociclib PO QD on days 1-21 of each cycle. Cycles repeat every 28 days for at least 60 months for hormone therapy and up to 3 years for ribociclib, in the absence of disease progression or unacceptable toxicity. Patients undergo CT scan, bone scan, or FDG PET-CT scan and may optionally undergo blood sample collection throughout the study.

Primary Outcome Measure

Invasive breast cancer-free survival (iBCFS) [ Time Frame: From randomization to invasive disease or death, up to 10 years ]

Locations (147)

Find similar trials in Jonesboro, AR

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