Phase II study to investigate the efficacy of trastuzumab biosimilar (Herzuma®) plus treatment of physician's choice (TPC) in patients with heavily pretreated HER-2+ metastatic breast cancer (KCSG BR 18-14/KM10B).
Patients with liver metastasis showed a trend of shorter PFS (HR = 1.47, 95% CI 0.98–2.21. p = 0.066).
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