ABSTRACTOBJECTIVE AND IMPORTANCE:Spinal dural arteriovenous fistulae (Type I spinal arteriovenous malformations [AVMs]) have been recognized as a treatable cause of progressive myelopathy. The diagnosis and characterization of these lesions rest heavily on spinal angiography.CLINICAL PRESENTATION:We present three patients whose clinical presentations were consistent with a spinal dural AVM but whose spinal angiographic results were negative.INTERVENTION:The surgical treatment of these angiographically occult spinal AVMs is described. In restrospect, in each case, the feeding vessel to the AVM was injected but not seen.CONCLUSION:Some spinal dural arteriovenous fistulae will be angiographically occult. If the clinical and radiographic presentations strongly suggest the presence of an arteriovenous fistula, surgical exploration should be considered.
Neurosurgery – Oxford University Press
Published: Apr 1, 1999
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