Eribulin Treatment for Patients with Metastatic Breast Cancer: The UK Experience – A Multicenter Retrospective Study

Introduction: This study examined real-world data from patients who received eribulin for metastatic breast cancer (MBC) collected from 14 hospitals across the UK. Methods: Anonymized data were collected retrospectively from patients with MBC who had received eribulin. The data included the hormone-receptor status, histological diagnosis, age, prior chemotherapy, response to eribulin, progression-free survival (PFS), and overall survival (OS). Results: Among 577 patients analyzed, the median age was 56 years, and most patients (73%) were estrogen-receptor positive. The median OS was 288 days (95% confidence interval [CI]: 261–315), and the PFS was 117 days (95% CI: 105–129). The median OS was higher among older patients (≥65 vs. <65 years: 325 days [95% CI: 264–385] vs. 285 days [95% CI: 252–317]; p = 0.028). The median OS was also higher in patients who received eribulin after fewer prior lines of chemotherapy (≤2 vs. >2 prior: 328 days [95% CI: 264–385] vs. 264 days [95% CI: 229–298]; p = 0.042). Discussion/Conclusion: These retrospective data suggest that eribulin can be successfully used in older patients with MBC. Eribulin treatment was more effective in earlier-line settings, which, while predictable, supports consideration of eribulin as a second-line treatment option.