MKI67 and central nervous system cancer: Further statistical analysis revealed that biopsy tissues with elevated kio values (> 1 s−1) had significantly increased Ki67+ in both primary (Figure 5E, 39.5% ± 8.9% vs 5.8% ± 0.76%, p < 0.0001, n = (40,6)) and recurrent (Figure 5F, 48.5% ± 6.4% vs 5.3% ± 0.97%, p < 0.0001, n = (21,12)) gliomas.