Immunohistochemical analysis of the proportions of Ki67 expression in tumor cells in comparison to normal glial cells (normal control tissue from patients 022, 023, and 026) indicated increased Ki67 expression in tumor cells for both oligodendroglioma and astrocytoma; however, these trends were not statistically significant [Figure 1B and C]. This evidence concerns the gene MKI67 and astrocytoma (excluding glioblastoma).