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Arq. neuropsiquiatr ; 64(3b): 781-786, set. 2006. ilus, tab
Article in English, Portuguese | LILACS | ID: lil-437149

ABSTRACT

Gliomatosis cerebri (GC) is a rare form of CNS neoplasia in which there is diffuse involvement of the nervous tissue with or without the presence of tumor mass. The origin of the tumor is unknown, nor whether it represents a disease with diffuse onset or infiltration from a neoplastic focus. Here we studied the histopathologic characteristics of 6 cases with a diagnosis of GC and performed an immunohistochemical analysis using glial fibrillary acidic protein (GFAP), synaptophysin, nestin and vimentin. Most tumor cells were negative for GFAP, even though there were foci of positivity for this marker in all cases. We detected the presence of many positive cells for nestin and vimentin in all studied samples. The presence of these cells may indicate origin of the tumor from undifferentiated cells with a high degree of mobility.


A gliomatosis cerebri (GC) é uma forma rara de neoplasia do sistema nervoso central em que existe o envolvimento difuso do tecido nervoso com ou sem a presença de massa tumoral. A origem do tumor é incerta, bem como se representa uma doença de início difuso ou uma infiltração a partir de um foco de neoplasia. Foram estudadas as características histopatológicas de seis casos com diagnóstico de GC e realizada imuno-histoquímica utilizando-se GFAP, sinaptofisina, nestina e vimentina. A maioria das células tumorais mostrou-se negativa para GFAP, apesar de existirem focos de positividade para este marcador em todos os casos. Observamos muitas células positivas para nestina e para vimentina em todas as amostras estudadas. Estas células poderiam indicar a origem do tumor em células multipotenciais com alto grau de mobilidade.


Subject(s)
Adolescent , Adult , Child , Female , Humans , Male , Middle Aged , Astrocytoma/metabolism , Brain Neoplasms/metabolism , Intermediate Filament Proteins/analysis , Nerve Tissue Proteins/analysis , Biomarkers, Tumor/analysis , Vimentin/analysis , Astrocytoma/pathology , Brain Neoplasms/pathology , Glial Fibrillary Acidic Protein/analysis , Immunohistochemistry , Magnetic Resonance Imaging , Synaptophysin/analysis , Tomography, X-Ray Computed
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