Abemaciclib for treating patients with HR+/HER2- metastatic breast cancer: a real-world study in France, Italy and Spain.

Aim: This real-world study aimed to describe patient and clinical characteristics, treatment patterns and outcomes for patients with HR+/HER2- metastatic breast cancer receiving abemaciclib in France, Italy and Spain. Materials & methods: A multicenter chart review was conducted for adult females with HR+/HER2- advanced/metastatic breast cancer who received abemaciclib in routine care. Real-world progression-free survival (rwPFS) was estimated via Kaplan-Meier curves. Results: This study included 151, 173 and 175 patients from France, Italy and Spain, respectively. Abemaciclib was mostly prescribed as first-line therapy concomitantly with hormone therapy. Median rwPFS was >20 months and the 1-year rwPFS rate was >70%. Conclusion: Effectiveness was similar across the three countries and aligns with pivotal studies.