Receptors with tyrosine kinase activity (TKRs), such as epidermal growth factor receptor (EGFR), platelet-derived growth factor receptor (PDGFR), or human epidermal growth factor 2 receptor (HER2), play a crucial role in cell growth and differentiation, and their overexpression or mutation is implicated in the development of several cancers [4]. This evidence concerns the gene ERBB2 and cancer.