A Study to Describe Treatment Patterns of Advanced Breast Cancer in Poland in the Real-world Data Setting

Inclusion Criteria: * Adult patients with histologically diagnosed advanced breast cancer (with locoregional recurrence not eligible for radical local treatment or with distant metastases) * Patient has a documented hormone (estrogen and/or progesterone) receptor expression and lack of HER2 receptor overexpression or lack of HER2 gene amplification (HR+/HER2- breast cancer subtype) * Patient had no prior treatment for advanced breast cancer * Patient has no symptomatic metastases to the central nervous system * There is no other malignancies in patient requiring active treatment * Patient is without co-occurring other malignancies treated with palliative assumption Exclusion Criteria: * Parallel patient's participation in any other clinical trial at the time when the decision over the advanced breast cancer treatment was made or up to 30 days before it.