MKI67 and squamous cell carcinoma: According to Myong et al.18, the Ki-67 immunohistochemical expression proved to be significantly higher in patients with neck lymph node metastasis, thus representing an independent prognostic factor in the survival of patients with oral cavity epidermoid carcinomas; pathological staging (pTNM) was the most important prognostic variable and Ki-67 expression has a significant effect on the cumulative survival rate of these patients.