ERBB2 and metastatic malignant neoplasm in the lymph nodes: No correlation was found between HER2 ratios before receiving treatment and tumor differentiation, lymph node metastasis (N1 or Nx), or distant metastasis (the liver or peritoneum) (Spearman r = −0.2414, p = 0.4848; r = −0.2048, p = 0.5697; and r = −0.4609, p = 0.1535, respectively).