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Child's Nervous System

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01-07-2011 | Original Paper

Clinico-radiological outcomes following gamma knife radiosurgery for pediatric arteriovenous malformations

Authors: Je Young Yeon, Hyung Jin Shin, Jong-Soo Kim, Seung-Chyul Hong, Jung-Il Lee

Published in: Child's Nervous System | Issue 7/2011

Abstract

Purpose

The aim of this study was to evaluate clinico-radiological outcomes following gamma knife radiosurgery (GKS) for pediatric arteriovenous malformations (AVMs).

Methods

The present series included 39 children (3–17 years of age) who underwent GKS for cerebral AVMs between January 2002 and February 2008. Twenty-five patients presented with hemorrhages. The median AVM volume was 1.5 cm³, and the median marginal dose was 20 Gy. All patients continued to have follow-up for more than 24 months with serial magnetic resonance images (MRIs)/angiograms. Current school performance has been evaluated using a telephone survey answered by the patients' parents.

Results

Follow-up angiograms, available in 34 patients, confirmed complete obliteration in 16 patients. Serial MRIs indicated obliteration of the nidus in one of five patients without angiography. The diffuse nidus structure and low marginal dose were significantly associated with incomplete obliteration. Twelve patients underwent a second GKS, and subsequent angiographies, available in six patients, demonstrated complete obliteration in two of them. Complications included new-onset seizures (n = 1), apraxia (n = 1), and temporal horn entrapment requiring a shunt operation (n = 1). School performance declined in 14 out of 32 patients. Both the AVM volume and modified AVM score were found to be reliable predictors of school performance.

Conclusions

The results of the present study substantiate the diffuse and other atypical features of pediatric AVMs as major determinants of treatment failure following GKS. Considering the apparent declination of school performance, future prospective studies would be required to investigate the possible late-effects of GKS on neuropsychological function.

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Title: Clinico-radiological outcomes following gamma knife radiosurgery for pediatric arteriovenous malformations
Authors: Je Young Yeon
Hyung Jin Shin
Jong-Soo Kim
Seung-Chyul Hong
Jung-Il Lee
Publication date: 01-07-2011
Publisher: Springer-Verlag
Published in: Child's Nervous System / Issue 7/2011
Print ISSN: 0256-7040
Electronic ISSN: 1433-0350
DOI: https://doi.org/10.1007/s00381-011-1401-5

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Clinico-radiological outcomes following gamma knife radiosurgery for pediatric arteriovenous malformations

Abstract

Purpose

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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