Tucatinib in Combination With Oral Etoposide andTrastuzumab in Patients With Metastatic HER2+ Breast Cancer
This is an open-label, multicenter, phase II study to evaluate the efficacy, safety, tolerability, pharmacokinetics of the combination of tucatinib-Oral VP16-trastuzumab in patients with HER2-positive metastatic breast cancer (HER2+ MBC) after progression on tucatinib-capecitabine-trastuzumab or capecitabine-related toxicity.