RESUMO

Aim: To outline the demographic and clinical features, treatment approaches and clinical outcomes of patients treated with palbociclib as the initial therapy for HR+/HER2- advanced or metastatic breast cancer (aBC/mBC) in private healthcare facilities in Brazil. Materials & methods: This study involved a retrospective review conducted from June 2022 to May 2023. Results: The study included 121 patients, with an average age of 54.4 years, and 82 (67.7%) were menopausal at the time of diagnosis. Of these, 51 patients (42.1%) were treated with palbociclib and fulvestrant, while 67 patients (55.8%) received palbociclib and aromatase inhibitors. Most patients (65.3%) did not need to adjust their doses. The progression-free survival rates were 78% at 6 months and 60% at 12 months. Overall survival rates were 86% at 6 months and 70% at 12 months. Conclusion: Palbociclib combinations show promising effectiveness in managing HR+/HER2- advanced or metastatic breast cancer.

Treatment & results in Brazilian women with advanced or metastatic breast cancer given palbociclibBreast cancer is a major health issue worldwide, and it is the most common cancer among women in Brazil, with death rates on the rise. A significant portion of breast cancer cases are hormone receptor-positive (HR+) and HER2-negative (HER2-), making targeted treatments essential. One such treatment is palbociclib, a medication that inhibits Cyclin-dependent kinase 4 and 6 (CDK4/6), enzymes important in cell division. Clinical trials such as PALOMA-1, PALOMA-2 and PALOMA-3 have shown that palbociclib can help patients with advanced or metastatic HR+/HER2- breast cancer live longer without their disease getting worse. Studies in real-world settings around the world have confirmed these benefits, evaluating how well the treatment works over time. Palbociclib was approved for use in Brazil in 2018. This study looks back at the records of women treated with palbociclib in private healthcare settings in the country. It aims to provide crucial information which can help guide future treatment decisions.