This clinical trial is focused on studying a type of breast cancer known as ER-positive, HER2-negative advanced or metastatic breast cancer. This type of cancer is characterized by the presence of estrogen receptors (ER-positive) and the absence of human epidermal growth factor receptor 2 (HER2-negative), which can influence how the cancer grows and responds to treatment. The study is testing a new treatment combination that includes a medication called ARV-471 and another medication known as Everolimus. Everolimus is already used in some cancer treatments, and ARV-471 is being studied to see how well it works with Everolimus.
The purpose of the study is to evaluate the safety and tolerability of the combination of ARV-471 and Everolimus. Participants in the study will receive these medications in the form of tablets that are taken orally. The study will monitor participants for any side effects and determine the best dose of the combination treatment. The trial will also look at how the cancer responds to the treatment over time.
Participants will be closely monitored throughout the study to ensure their safety and to gather information on how the treatment affects their cancer. The study aims to find out if this combination of medications can be a safe and effective treatment option for people with ER-positive, HER2-negative advanced or metastatic breast cancer. The trial is expected to continue until 2025, with the goal of providing valuable insights into this potential treatment option.



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