MKI67 and neoplasm: Positive staining for p53 was found in 38% of the tumours (28% were stained with level 1 and 10% with level 2), whereas those stained with Ki67 revealed the following rates: 75% of all tumours for level 1 (1–19%), 17% for level 2 (20–39%) and 8% for level 3 (40–60%).