This clinical trial is focused on studying breast cancer, specifically a type known as HER2-positive early breast cancer. The study is investigating a treatment that includes a combination of medications: trastuzumab, pertuzumab, and docetaxel. These medications are used together to see if they can improve the outcomes for patients with this type of breast cancer.
The purpose of the study is to determine if adding pertuzumab to the existing treatment regimen, which already includes trastuzumab and chemotherapy, can help patients live longer without the cancer coming back. The study will compare this new combination treatment to the current standard treatment to see which is more effective.
Participants in the study will receive the treatment through an intravenous infusion, which means the medication is given directly into a vein. The study will follow participants over a period of time to monitor their health and any side effects they may experience. Some participants may receive a placebo as part of the study. The main goal is to see if the new treatment combination can improve the chances of staying cancer-free after treatment.



Finland
Sweden