MKI67 and neoplasm: In accordance with the tumor weight reduction findings, treatment with AZA197 decreased the number of Ki-67-positive cells in tumors based on counting 20 randomly selected microscopic fields by 27.4 ± 14.2% (P = 0.046) in AZA197-treated tumors, suggesting an anti-proliferative effect for AZA197 (Figure 6B).