Gamma Knife surgery for angiographically occult vascular malformations

To evaluate the effect of radiosurgery on angiographically occult vascular malformations (AOVMs), 9 patients treated with Gamma Knife surgery were followed up for 21-37 months. Eight patients had bleeding episodes, 1 had uncontrollable epilepsy. Rebleeding occurred in 3 AOVMs 5 or 6 months after tre...

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Bibliographic Details
Published inStereotactic and functional neurosurgery Vol. 64 Suppl 1; p. 98
Main Authors Seo, Y, Fukuoka, S, Takanashi, M, Nakagawara, J, Suematsu, K, Nakamura, J, Nagashima, K
Format Journal Article
LanguageEnglish
Published Switzerland 1995
Subjects
Adolescent
Adult
Aged
Cerebral Angiography
Female
Follow-Up Studies
Humans
Intracranial Arteriovenous Malformations - diagnosis
Intracranial Arteriovenous Malformations - surgery
Male
Middle Aged
Radiosurgery
Tomography, Emission-Computed, Single-Photon
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Summary:To evaluate the effect of radiosurgery on angiographically occult vascular malformations (AOVMs), 9 patients treated with Gamma Knife surgery were followed up for 21-37 months. Eight patients had bleeding episodes, 1 had uncontrollable epilepsy. Rebleeding occurred in 3 AOVMs 5 or 6 months after treatment. One patient experienced transient radiation-induced edema. One patient underwent surgical extirpation due to uncontrollable epilepsy 21 months after Gamma Knife surgery. Histological findings revealed an arteriovenous malformation (AVM) and a cavernous angioma. There was hypertrophy of the internal membrane of the AVM, but no effect on the cavernous malformation. Radiosurgery should only be considered in cases of inoperable AOVM, because there is no definite proof that radiosurgery prevents AOVMs from rebleeding.
ISSN:1011-6125
DOI:10.1159/000098769