distributions of two different subclasses of intermediate filaments , vimentin and glial filaments , were studied immunohistochemically in human brain tumors using specific antiserum to each protein subunit , vimentin and astroprotein ( gfap ) , surgical specimens ( 5 meningiomas , 4 ependymomas , 5 benign astrocytomas , 5 anaplastic astrocytomas and 7 glioblastomas ) were fixed in 95 % ethanol or ethanol-acidic acid ( 95:5 ) and embedded in paraffin avidin biotin peroxidase-complex ( abc ) method ( vectastain ) was carried out on 6 microns-thick paraffin sections .
C0004114
astrocytomas
C0017636
glioblastomas