title: Thoracic spine extradural arteriovenous fistula: case report and review of the literature.
abstract: BACKGROUND
  Spinal extradural arteriovenous fistula is a rare, disabling, but potentially treatable disease. Only 27 cases have been reported so far in the past 40 years.
  
  
  METHODS
  An 18-year-old adolescent girl developed repeated back pain and mild paraplegia after a training course. Magnetic resonance imaging revealed a vessel-like lesion at the spinal extradural space, compressing the spinal medulla at the T5 level. Angiography disclosed a focal fistula fed by branches of the intercostal artery. The vascular mass was surgically removed and confirmed pathologically.
  
  
  CONCLUSIONS
  Spinal extradural arteriovenous fistulas have an arterial supply that originates outside the spinal dura, with venous draining into the spinal extradural venous plexus. They may lead to myelopathy, radiculopathy, or spontaneous extradural hematoma, due to dilated vein compression, blood stealing, or spinal venous hypertension. Extradural hematoma needs emergency laminectomy and clot evacuation. And extradural arteriovenous fistulas should be treated actively by embolization, surgical resection, or both. Appropriate treatment will stabilize the patient or result in neurological improvement.
authors.affiliation: Department of Neurosurgery, West China Hospital, West China Clinical Medical School, Sichuan University, Chengdu, Sichuan Province 610041, PR China. zhangheng.cn@gmail.com
authors.forename: Heng
authors.initials: H
authors.lastname: Zhang
authors.forename: Min
authors.initials: M
authors.lastname: He
authors.forename: Boyong
authors.initials: B
authors.lastname: Mao
mesh_terms: D000293:Adolescent; D001164:Arteriovenous Fistula / Q000150:complications / Q000175:diagnosis* / Q000601:surgery*; D005260:Female; D006801:Humans; D008866:Microsurgery; D013115:Spinal Canal / Q000098:blood supply*; D013117:Spinal Cord Compression / Q000209:etiology / Q000601:surgery; D013904:Thoracic Vertebrae