According to the 2015 St Gallen Consensus Conference and ESMO surrogate definitions of BC molecular subtypes, in our series, 25.7% were luminal A like, 19.3% were luminal B - HER2-negative like, 7.9% were luminal B - HER2-positive like, 15,7% were HER2 positive and 31,4% were triple negative. The gene discussed is ERBB2; the disease is breast cancer.