llresultinthecorrectdiagnosis.MostinthoracolumbarregionThearteriovenousshunt:theduramaterofaproximalrootsleeve,pedicle(radiculomeningealarteryentersaradicularvein).Hypo-/paresthesias,progressiveparaparesis,backpainthatcanirradiatetothelowerlegs,impotence,andsphincterdisturbances.Usually,thedeficitsareslowlyprogressive;however,anacuteonsetofdiseaseandaprogressivedevelopmentinterruptedbyintermediateremissionsisalsopossible.Withouttherapy,thislesionresultsinirreversiblepara-oreventetraplegia.spinalvenouspressurearteriovenouspressuregradientdrainageofnormalspinalveinsvenouscongestionwithintramedullaryedema(usuallylowercordandconus)chronichypoxiaandprogressivemyelopathySpinalduralarteriovenousfistulae(SDAVF)ountforapproximately70%ofallAVshuntsofthespine.locationmechanismSDAVFmisdiagnosedsymptom
全文预览