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[Cerebellar hemangioblastomas--a study of the immunoprofile of neoplastic stromal component].

Abstract：

BACKGROUND:Central nervous system hemangioblastomas (HBs) are uncommon, highly vascularized tumors that are predominantly found in the cerebellum. They occur sporadically or in association with von Hippel-Lindau (VHL) disease. HBs are of unknown histogenesis, and the origin of stromal cells is still a subject of debate. The aim of this study was to investigate the immunoprofile of neoplastic stromal component, and to determine whether the profile of the expression of immunomarkers used can contribute to the elucidation of the histogenesis of HBs. METHODS:A series of eight cerebellar HBs were histochemically examined for the detection of mast cells and immunohistochemically for the expression of factor VIII-related antigen (FVIII-RAg), CD34, vimentin, factor XIIIa (FXIIIa), S-100 protein, glial fibrillary acidic protein (GFAP), neuron-specific enolase (NSE), neurofilaments (NF), synaptophysin, chromogranin, and somatostatin. RESULTS:Mast cells were present in all hemangioblastomas, and were particularly abundant in one tumor. Immunohistochemically, intense reactivity for vimentin and NSE in the stromal cells was constantly seen. Immunoreactivity with S-100 protein and FXIIIa was variable, but generally many HBs stromal cells were negative for these markers. However, stromal cells were uniformly negative for FVIII-RAg in all HBs investigated. They were negative for CD34, GFAP, NF, synaptophysin, chromogranin, as well as somatostatin. GFAP-positivity of the occasional stromal type cells, located only peripherally, was interpreted as "pseudopositivity". CONCLUSION:The immunoprofile of neoplastic stromal component in this study suggested a possible origin from undifferentiated multipotential mesenchymal cells. High expression of NSE (glycolytic and hypoxia-inducible enzyme) in the HBs stromal cells might be related to the loss of the VHL protein function.

journal_name

Vojnosanit Pregl

journal_title

Vojnosanitetski pregled

authors

Tasić D,Dimov D,Kostov M,Ilić S,Dojcinov D,Jovanović M,Stanojević G,Dimov I

doi

10.2298/vsp0403273t

subject

Has Abstract

pub_date

2004-05-01 00:00:00

pages

273-82

issue

3

eissn

0042-8450

issn

2406-0720

journal_volume

61

pub_type

杂志文章

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