MKI67 and astrocytoma (excluding glioblastoma): Faria MH et al. [50] found that a Ki-67 LI above 8.0% could be identified as grade IV astrocytoma, and Ki-67 LI between 1.5% and 8.0% can be identified as grade III astrocytoma (sensitivity, 0.85; specificity, 0.86), and Ki-67 LI below 1.5% can be identified as grade I and II astrocytoma.