NCIt definition : A grade 3 or grade 4 glioma arising from the central nervous system. This category
includes glioblastoma, anaplastic astrocytoma, anaplastic ependymoma, anaplastic oligodendroglioma,
and anaplastic oligoastrocytoma.;
Alternative definition : CDISC: A malignant neuroglial neoplasm. The term can apply to several primary neoplasm
of the brain and spinal cord, including astrocytoma and oligodendroglioma in addition
to others.;