This clinical trial is focused on studying a type of breast cancer known as HER2-positive Metastatic Breast Cancer. This is a form of cancer that has spread beyond the breast and is characterized by an excess of a protein called HER2. The study will explore the effects of a treatment called trastuzumab deruxtecan (also known as T-DXd) when used in combination with other cancer-fighting drugs. These additional drugs include pertuzumab, durvalumab (also known as IMFINZI), and infliximab (known as Inflectra), among others. The purpose of the study is to assess the safety, tolerability, and effectiveness of these drug combinations in treating this type of breast cancer.
The study will be conducted in two main parts. In the first part, researchers will determine the best dose of the drug combinations to use. This is known as the dose-finding phase. In the second part, the study will expand to include more patients to further evaluate the safety and effectiveness of the treatment at the determined dose. This is called the dose-expansion phase. The study will include patients who have already received treatment for their cancer as well as those who have not yet been treated for advanced or metastatic disease.
Throughout the study, participants will receive the treatments either orally or through an infusion, which is a method of delivering medication directly into the bloodstream. The study aims to provide valuable information on how these drug combinations can help manage HER2-positive Metastatic Breast Cancer, including patients with brain metastases, which are cancer cells that have spread to the brain. The study is expected to continue until 2025, with recruitment starting in 2024.



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