The concentration of serum SRGN was significantly higher in patients with TNBC (TNBC, Figure 5i), in breast cancer patients with lymph node metastasis (Nodal Positive, Figure 5j), and in TNBC patients with lymph node metastasis (Nodal Positive, Figure 5k) than that in patients without TNBC [Luminal A (P<0.01), Luminal B (P<0.01), and HER2 (P<0.001)] (Figure 5i), in BC patients without lymph node metastasis (Nodal Free) (P<0.01) (Figure 5j), and TNBC patients without lymph node metastasis (Nodal Free) (P<0.05) (Figure 5k), respectively. This evidence concerns the gene ERBB2 and metastatic malignant neoplasm in the lymph nodes.