Parameters affecting recurrence and survival were investigated, and the effectiveness of existing classification and scoring systems was compared.<h4>Results</h4>Factors potentially associated with recurrence included four or more mitoses (10 HPF) (p=0.023), necrosis (p=0.007), at least 10% Ki-67 positivity (p=0.012), malignancy (p=0.046), and tumor size (p=0.022). The gene discussed is MKI67; the disease is neoplasm.