ERBB2 and breast carcinoma: Numerous genetic breast cancer variants are recognized such as luminal A and B (which account for 50% of breast cancer incidences) basal‐like or triple‐negative (10%–20% of tumor cases) and HER2‐enriched (which stands for 10%–20% of tumor cases) 10%–15% of cases (Lam et al., 2014).