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First received: November 06, 2023

Clinical Trial: A Study of Changes in Ki67 Expression in People With Breast Cancer Receiving Endocrine Therapy Before Surgery

Study Status: Completed

Recruit Status: RECRUITING

Condition: Breast Cancer

Study Type: INTERVENTIONAL


Official Title: Differential Changes in Ki67 Between Carriers and Noncarriers of BRCA2 Mutations With Estrogen Receptor-Positive, Human Epidermal Growth Factor Receptor 2-negative Breast Cancer Treated With Preoperat

Brief Summary: The researchers are doing this study to look at changes in Ki67 expression after at least 2 weeks of endocrine therapy in people with ER+/HER2- breast cancer undergoing cancer removal surgery.Participants will receive the endocrine therapy before their surgery.The researchers will look at how changes in Ki67 expression compare between participants who are carriers of the BRCA2 mutation and participants who are noncarriers of the BRCA2 mutation.

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