Similarly, in a study of oral cavity squamous cell carcinoma, Szelachowska et al. found MCM2 to be prognostically superior to Ki67 in predicting 5-year OS [39] whereas the findings of Rodins et al. demonstrated MCM2 to be a better marker of proliferation than Ki67 in normal renal epithelial cells and in different types of renal tumours, with Ki67 significantly underestimating the number of dividing cells [40]. This evidence concerns the gene MKI67 and oral cavity squamous cell carcinoma.