This retrospective study included 156 patients with recurrent/stage IV BC who received eribulin monotherapy...Multivariate analysis revealed low albumin-bilirubin grade (P< 0.001), high hemoglobin (P< 0.01), and low PLR (P< 0.05) as independent factors of longer OS after eribulin administration. Low PLR, anemia, and liver dysfunction might be factors associated with prolonged OS in patients with recurrent/stage IV BC on eribulin therapy...