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Clinical Trial Summary

This phase I trial studies the side effects of stereotactic radiosurgery with abemaciclib, ribociclib, or palbociclib in treating patients with hormone receptor positive breast cancer that has spread to the brain (brain metasteses). Stereotactic radiosurgery is a specialized radiation therapy that delivers a single, high dose of radiation directly to the tumor and may cause less damage to normal tissue. Abemaciclib, ribociclib, and palbociclib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Giving abemaciclib, ribociclib, or palbociclib concurrently with stereotactic radiosurgery may reduce the side effects and/or increase the response to each of the therapies.


Clinical Trial Description

PRIMARY OBJECTIVE: I. Prospectively evaluate safety and toxicity of the combination of radiosurgery (SRS) and concurrent CDK 4/6 inhibitors (CDKi) for hormone receptor positive (HR+) breast cancer patients. SECONDARY OBJECTIVES: I. Evaluate late toxicity (after 3 months) following SRS and concurrent CDKi. II. Evaluate local control efficacy with combination therapy of SRS and concurrent CDKi. III. Assess quality of life and neurologic functional outcomes following treatment using standardized questionnaire (Functional Assessment of Cancer Therapy-Brain [FACT-Br]). IV. Analyze overall survival. OUTLINE: Patients are assigned to 1 of 3 groups. GROUP I: Beginning within 2 weeks prior to stereotactic radiosurgery, patients receive abemaciclib orally (PO) twice daily (BID). Treatment continues in the absence of disease progression or unacceptable toxicity. GROUP II: Beginning within 2 weeks prior to stereotactic radiosurgery, patients receive ribociclib PO once daily (QD) on days 1-21. Treatment continues in the absence of disease progression or unacceptable toxicity. GROUP III: Beginning within 2 weeks prior to stereotactic radiosurgery, patients receive palbociclib PO QD on days 1-21. Treatment continues in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up at 30 days, 4-6 weeks post stereotactic radiosurgery, and then every 3 months for up to 1 year. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT04585724
Study type Interventional
Source Emory University
Contact
Status Withdrawn
Phase Phase 1
Start date June 12, 2020
Completion date September 13, 2021

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