MKI67 and neoplasm: - There were more Ki-67-positive cells in nodular lesions than in macular lesions (P<0.001).- Ki-67 expression was associated with tumor type in OMM.- The expression of Ki-67 in recurrent OMM was significantly higher than in primary OMM (P = 0.03).- Cases with high Ki-67 expression had significantly poorer overall survival.- Ki-67 expression was an independent prognostic factor for poor overall survival- OMM patients with higher Ki-67 showed poor survival time in comparison to those with lower Ki-67