Most patients presented with hormone receptor‐positive (n = 22, 81.5%) and HER2‐negative (n = 21, 77.8%) primary tumors; in most cases, the tumor stage was pT2‐4 (n = 23, 85.2%), the nodal status was pN1‐3 (n = 14, 51.9), and the grade was G3 (n = 14, 51.9%). The gene discussed is ERBB2; the disease is neoplasm.