Outcomes and Prognostic Factors in HER2-Positive Metastatic Breast Cancer Patients Who Had Developed Brain Metastasis in the Treatment Process.

Introduction: Patients with HER2-positive metastatic breast cancer are at risk for developing brain metastases. Different anti-HER2 treatments can be used in the management of the disease. In this study, we aimed to evaluate the prognosis and the factors affecting the prognosis in brain metastatic patients with HER2-positive breast cancer.