Other studies in oral cancer investigating the correlation between Ki-67 expression and overall survival in patients found conflicting results although several studies confirmed that a lower Ki-67 expression exhibited better patient survival (Gonzalez-Moles et al, 1996; Piffko et al, 1996; Stoll et al, 2000; Myoung et al, 2006; Kim et al, 2007). The gene discussed is MKI67; the disease is lip and oral cavity carcinoma.