ROMO1 and metastatic malignant neoplasm in the lymph nodes: By multivariate analysis with Cox’s proportional hazard regression model, lymph node metastasis (HR: 4.671, 95% CI: 1.655–13.185), higher LNR(HR: 4.009, 95% CI: 1.585–10.141), and high Romo1 expression (HR: 2.735.