title: Large hemangiopericytoma associated with arteriovenous malformations and dural arteriovenous fistulae.
abstract: BACKGROUND
  Hemangiopericytomas are rare vascular tumors of the central nervous system. Although hemangiopericytomas have been associated with other vascular malformations, there is no report of an intracranial hemangiopericytoma found in association with multiple arteriovenous malformations and dural arteriovenous fistulae.
  
  
  METHODS
  We present the case of an otherwise healthy 25-year-old woman who presented with a large hemangiopericytoma involving the superior sagittal sinus. The highly vascular nature of the lesion, the total occlusion of the sinus anterior to the tumor, and the presence of multiple arteriovenous malformations and dural arteriovenous fistulae complicated resection of this tumor.
  
  
  CONCLUSIONS
  To our knowledge, no prior report has described a tumor of this magnitude in association with multiple AVMs and dAVFs.
authors.affiliation: Division of Neurological Surgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA.
authors.forename: M Yashar S
authors.initials: MY
authors.lastname: Kalani
authors.forename: Nikolay L
authors.initials: NL
authors.lastname: Martirosyan
authors.forename: Jennifer M
authors.initials: JM
authors.lastname: Eschbacher
authors.forename: Peter
authors.initials: P
authors.lastname: Nakaji
authors.forename: Felipe C
authors.initials: FC
authors.lastname: Albuquerque
authors.forename: Robert F
authors.initials: RF
authors.lastname: Spetzler
mesh_terms: D000328:Adult; D001164:Arteriovenous Fistula / Q000150:complications*; D016543:Central Nervous System Neoplasms / Q000098:blood supply / Q000150:complications* / Q000601:surgery; D002533:Cerebral Angiography; D003392:Cranial Sinuses / Q000473:pathology; D004388:Dura Mater / Q000002:abnormalities*; D004621:Embolization, Therapeutic; D005260:Female; D006393:Hemangiopericytoma / Q000098:blood supply / Q000150:complications* / Q000601:surgery; D006801:Humans; D002538:Intracranial Arteriovenous Malformations / Q000150:complications*; D008279:Magnetic Resonance Imaging; D019635:Neurosurgical Procedures; D016634:Radiosurgery; D012039:Regional Blood Flow / Q000502:physiology; D025321:Surgery, Computer-Assisted