Document Detail

Peritumoral edema after stereotactic radiosurgery for intracranial meningiomas and molecular factors that predict its development.
MedLine Citation:
PMID:  17245625     Owner:  NLM     Status:  MEDLINE    
INTRODUCTION: Stereotactic radiosurgery (SRS) is an effective treatment for small and medium-sized meningiomas. Although uncommon, peritumoral edema can develop as a delayed complication after SRS. The purpose of the study was to evaluate the clinical and molecular risk factors for peritumoral edema after SRS for intracranial meningiomas. METHODS: We retrospectively reviewed the results from 18 patients with intracranial meningiomas who underwent SRS. Tissue was obtained from 14 of these patients who also underwent surgery (13 before SRS). Peritumoral edema, before and after SRS, was estimated using the edema index. Quantitative differences in molecular markers of angiogenesis (VEGF, VRGFr) and hypoxia (HIF-1, GLUT-1, and CA-IX) as well as proliferative indices between patients with and without an elevated edema index after SRS were evaluated. RESULTS: Of the 18 patients studied, symptomatic peritumoral edema developed in three after SRS. They were treated with steroids and one required surgical intervention. The mean time to edema onset was 5.5 months, with an average duration of 16 months. Sagittal sinus occlusion and high-grade histology appear to be more common in the edema group. VEGF and HIF-1 were found in tumors with higher edema index and the elevation of these proteins was correlated with peritumoral edema after SRS. Proliferative index was not predictive for peritumoral edema. CONCLUSION: Clinical characteristics and molecular markers may identify patients with meningiomas at risk of peritumoral edema after SRS. Judicious use of steroids or perhaps the use of stereotactic fractionated radiation should be considered in these high-risk patients.
Peter Kan; James K Liu; Merideth M Wendland; Dennis Shrieve; Randy L Jensen
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Publication Detail:
Type:  Journal Article     Date:  2007-01-24
Journal Detail:
Title:  Journal of neuro-oncology     Volume:  83     ISSN:  0167-594X     ISO Abbreviation:  J. Neurooncol.     Publication Date:  2007 May 
Date Detail:
Created Date:  2007-04-19     Completed Date:  2007-06-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8309335     Medline TA:  J Neurooncol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  33-8     Citation Subset:  IM    
Department of Neurosurgery, University of Utah Health Sciences Center, 175 N. Medical Drive East, Salt Lake City, UT 84132, USA.
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MeSH Terms
Aged, 80 and over
Antigens, Neoplasm / metabolism
Brain Edema / etiology*
Carbonic Anhydrases / metabolism
Factor VIII / metabolism
Glucose Transporter Type 1 / metabolism
Hypoxia-Inducible Factor 1, alpha Subunit / metabolism
Ki-67 Antigen / metabolism
Meningeal Neoplasms / etiology,  metabolism,  pathology,  surgery*
Meningioma / etiology,  metabolism,  pathology,  surgery*
Middle Aged
Predictive Value of Tests
Radiosurgery / adverse effects*
Retrospective Studies
Risk Factors
Vascular Endothelial Growth Factor A / metabolism
Reg. No./Substance:
0/Antigens, Neoplasm; 0/Glucose Transporter Type 1; 0/HIF1A protein, human; 0/Hypoxia-Inducible Factor 1, alpha Subunit; 0/Ki-67 Antigen; 0/Vascular Endothelial Growth Factor A; 9001-27-8/Factor VIII; EC protein, human; EC Anhydrases

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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