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Between May,1988,and August,1992,80 patients with arteriovenous malformations(AVM's)were treated radiosurgically at the University of Florida.A mean dose of 1650 cGy was directed to the periphery of the lesion,which almost always corresponded to the 80%isodose line.The mean lesion diameter was 23 mm.Seventy-six patients were treated with one isocenter.Angiography,performed at 1 year after radiosurgery in 41 of the 48 eligible patients,revealed an overall complete thrombosis rate of 39%. The 1-year thrombosis rate was highest in those patients with relatively small AVM's.Angiography was performed at 2 years posttreatment in 21 of the 25 eligible patients,demonstrating an overall complete thrombosis rate of 81%.This incidence did not correlate with lesion size;that is,large lesions(up to 35 mm in diameter)seemed just as likely to thrombose.Two patients(2.5%)experienced hemorrhage at some time after radiosurgical treatment,and both recovered.Two patients(2.5%)have sustained mild,but permanent,radiation-induced neurological complications. |
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arteriovenous malformation
arteriovenous malformation,cerebral
iatrogenic neurologic disorders
linear accelerator
malformation,vascular
malformation,vascular,cerebral
malformation,vascular,treatment of
MRI,abnormal
radiation therapy,CNS treatment and complications with
radiation therapy,stereotactic
seizure
treatment of neurologic disorder
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