The in vitro cytotoxicity of trastuzumab-AuNP-111In on HER2+ breast cancer cells and their in vivo studies on tumor growth inhibitory properties and tissue toxicity after intratumoral injection in athymic mice with s.c. (injected subcutaneously) HER2-overexpressing MDA-MB-361 human BC xenografts have been described by Cai et al. [71]. Here, ERBB2 is linked to breast carcinoma.