A Pilot Study of Eribulin in Breast Cancer (BC) Patients With Brain Metastases Previously Treated With Anthracyclines and Taxanes

This is a pilot study, the principal investigator plans to enroll 14 patients. If 2 or more responses are documented, the principal investigator will consider to start a new phase II study. If there is less than 2 responses in the 14 patients, it is unlikely that Eribulin will produce 15% or more response rate in patients with active brain metastases, thus indicating no need to study further. Based on Poisson distribution, there is 38% probability of observing 1 or 0 response even if the underlying response is 15%. There is no null hypothesis, hence no p-value of significance.