MKI67 and neoplasm: In Ki-67- and H/E-stained KB-3-1 tumor sections, similar results were obtained as compared to the allograft model in terms of rates of proliferating cells: in the control group 99.5 ± 0.6% and in the treatment group 98.8 ± 0.6% of Ki-67-positive cells were found (Figure 2d) and 1.5 ± 0.4% mitotic cells were counted in the control versus 1.3 ± 0.3% in the treatment group (Figure 2e).