As shown in Table 4, statistically significant differences were observed between HER-2 score groups and the variables of pathological subtype (p = 0.014), liver metastasis (p = 0.005), lung metastasis (p = 0.014), peritoneal metastasis (p = 0.039), and other metastases (p = 0.025). Here, ERBB2 is linked to metastasis.