Poziotinib in Patients With HER2+ Recurrent Stage IV BC Who Have Received at Least 2 Prior HER2-directed Regimens

To evaluate the efficacy of NOV120101 (Poziotinib) as a therapeutic agent for HER2-overexpressed recurrent stage IV breast cancer, patients who have received at least two prior HER2-directed regimens will be enrolled in this study. Subjects will receive NOV120101 (Poziotinib) 12 mg PO once daily for 2 weeks followed by 1-week drug-free intervals between cycles until disease progression or unacceptable toxicity development. Progression Free Survival (PFS) will be analyzed as the primary endpoint in this trial. Secondary endpoints including PFS rate at 12 weeks, ORR, DCR, OS and TTP will also be analyzed.