ERBB2 and neoplasm: As mentioned in the Section 4, when the HER2-overexpressing PDTX tumor reached 80–100 mm3, 10 mg/kg of samfenet was administered intraperitoneally (IP) twice weekly, and 1 × 107 primary NK cells or 5 × 106 NK92-CD16 cells were administered intravenously (IV) twice weekly in parallel with samfenet injection.