Through univariate analysis and multifactorial logistic regression model analysis of the included clinical features, the number of lymph node metastases, ER expression, HER-2 expression, molecular typing, clinical staging, and ultrasonographic blood flow grading were identified as independent factors influencing the risk of postoperative recurrence. The gene discussed is ERBB2; the disease is metastatic malignant neoplasm in the lymph nodes.