Brain Metastasis Development Mechanism in BCBM Patients

This study is investigating how breast cancer spreads to the brain — a serious complication called brain metastasis — by analyzing tissue samples from patients who have had brain surgery to remove these tumors. Understanding the biology of how breast cancer cells travel to and grow in the brain may help scientists develop better treatments to prevent or treat this condition. **You may be eligible if:** - You have been diagnosed with breast cancer - You are undergoing or have undergone open surgery to remove a brain metastasis (a tumor that has spread from breast cancer to the brain) **You may NOT be eligible if:** - Your brain metastasis was treated with Gamma Knife radiosurgery (a non-surgical radiation treatment) instead of open surgery Talk to your doctor to see if this trial is right for you.