Resumen
Poly(adenosine diphosphate-ribose) polymerase inhibitors have recently been shown to be effective for patients with human epidermal growth factor receptor 2?negative (HER2-) advanced breast cancer (ABC) who have a germline mutation in their breast cancer susceptibility gene 1 or 2 (BRCA1/2mut). This study evaluated differences in patient demographics, clinical characteristics, and BRCA1/2mut testing within the United States (US), European Union 4 (EU4; France, Germany, Italy, and Spain), and Israel in a real-world patient population with HER2- ABC. In the US, EU4, and Israel, 73%, 42%, and 99% of patients were tested for BRCA1/2mut, respectively. In the US and the EU4, patients who were not tested versus tested for BRCA1/2mut were more likely to have hormone receptor?positive (HR+)/HER2- ABC than triple-negative breast cancer, less likely to have a known family history of BRCA1/2-related cancer and were older. Efforts should be made to improve BRCA1/2 testing rates in the US and Europe.