ERBB2 and neoplasm: The HER2 amplification status was not correlated with tumor size (p = 0.88, R = 0.05; Spearman test), histological grade (p = 0.4, R = 0.09; Spearman test), lymph node metastasis (p = 0.39 R−0.13 Spearman test), and systemic metastasis (p = 0.21, R = 0.23; Spearman test).