the presence of laminin in 13 glioblastomas , 15 anaplastic astrocytomas , 7 astrocytomas , and 6 pilocytic astrocytomas was examined by peroxidase-antiperoxidase ( pap ) staining of formalin-fixed and paraffin-embedded surgical specimens .
C0017636
glioblastomas
C0004114
astrocytomas