SNAI1 and metastatic malignant neoplasm in the lymph nodes: Inclusion of 2 additional cases displaying SNAI1-positivity >10% in lymph node metastases defined a poor-prognosis group with significantly shorter EFS (median 5 vs. 42 months, p = 0.0007) and DSS (median 9 vs. undefined, p = 0.0005) (Figure 2 and Additional File 2).