ESR1 and metastatic malignant neoplasm in the lymph nodes: p < 0.001, for both molecules (paracancerous vs. cases)IE and LA proteins were increased in lymph node metastasis (92.6%) compared to non-metastatic SLN samples (60.0%) (p < 0.001, for both).IE expression was negatively correlated with ER (p < 0.05)