Brain Metastases From Breast Cancer

This study aims to evaluate the diagnostic potential of 68-Gallium PSMA-PET/CT in stereotactic irradiated brain metastases from non-small cell lung cancer, melanoma and breast cancer.

Central nervous system (CNS) metastases including breast cancer brain metastases (BCBMs) and leptomeningeal disease (LMD) are common affecting up to 30% of patients with metastatic breast cancer (MBC). The goal of this research is to understand symptom burden and quality of life trajectories in this population and how treatments guide care management decisions.

The goal of this real-world study (RWS) is to evaluate the effectiveness of Trop-2 ADC (sacituzumab govitecan) in treating breast cancer patients with brain metastases, and to understand the safety profile of this drug in real clinical practice across multiple centers. The main questions it aims to answer are: Does Trop-2 ADC (sacituzumab govitecan) improve intracranial outcomes in breast cancer patients with brain metastases (e.g., intracranial objective response rate, intracranial progression-free survival)? What types and rates of adverse events do breast cancer patients with brain metastases experience when receiving Trop-2 ADC (sacituzumab govitecan)? This is a multicenter real-world study, which will collect and analyze data from breast cancer patients with brain metastases who have received Trop-2 ADC (sacituzumab govitecan) in routine clinical care (no randomization or placebo control, consistent with real-world clinical scenarios). Participants (breast cancer patients with brain metastases who received Trop-2 ADC) will have their data collected from: Electronic health records (EHRs) across multiple medical centers Regular clinical follow-up visits (e.g., once every 4-8 weeks) for imaging assessments (to evaluate brain metastasis changes) and safety monitoring Medical records documenting treatment responses, disease progression, and any adverse events during treatment and follow-up