The primary aim of this study is to characterize patients and treatments of metastatic breast cancer in Brazil. Other specific aims are:
* to describe patients demographics and socioeconomic characteristics
* to describe the BC pathological characterization
* to describe treatment (describe each treatment with dates start-end, cycles, dosing, sequence and line of treatment, reason for discontinuation)
* to analyze patients outcome (time to progression, site of metastasis, progression free survival (PFS), overall survival (OS), skeletal related events (SRE))
