We next performed a Cox multivariate analysis of DFS, taking account of tumor size, clinical staging, differentiation, lymph node metastasis, estrogen receptor(ER), human epidermal growth factor receptor 2(Her2), proliferating cell nuclear antigen(PCNA) status, apoptosis index (AI) and ALDH1 expression as categorical variables. The gene discussed is ERBB2; the disease is neoplasm.