MKI67 and neoplasm: As expected, the Ki-67 index correlated with p53 (r = 0.278, p = 0.001), tumor invasiveness (r = 0.241, p = 0.005), the maximum diameter (r = 0.38, p < 0.0001) as well as p53 staining (p < 0.05), but not with MGMT positive staining and recurrence (p > 0.05).