MKI67 and metastatic malignant neoplasm in the lymph nodes: Univariate logistic regression analysis revealed that lymphovascular invasion (OR = 21.75; p = 0.030), lymph node metastasis (OR = 22.50; p = 0.028), and a Ki-67 proliferative index of more than 5% (OR = 18.75; p = 0.014) were statistically significant risk factors for distant metastasis.