(*) Glioblastomas account for
approximately 60 to 70% of malignant gliomas, anaplastic astrocytomas for 10
to 15%, and anaplastic oligodendrogliomas and anaplastic oligoastrocytomas
for 10%; less common tumors such as anaplastic ependymomas and anaplastic
gangliogliomas account for the rest. (Wen PY, Kesari S, Malignant Gliomas
in Adults, N Engl J Med 2008;359:492-507).