However, targeted therapy aimed at tumors with fusion mutations of the fibroblast growth factor receptor (FGFR), isocitrate dehydrogenase (IDH) 1 and 2, the genes encoding the B-Raf protein (BRAF), breast cancer (BRCA1/2), epidermal growth factor receptor 2 (HER2), and the neurotrophic receptor tyrosine kinase gene (NTRK), is gradually changing the paradigm in the treatment of this disease. Here, ERBB2 is linked to breast cancer.