title: Endovascular treatment of ruptured dissecting aneurysms of the posterior inferior cerebellar artery.
abstract: BACKGROUND
  Dissecting aneurysms of the posterior inferior cerebellar artery (PICA) are rare, with optimal treatment strategies not well established according to the location of the aneurysm on the PICA. We present our single-center experience of endovascular treatment of ruptured dissecting aneurysms of the PICA.
  
  
  METHODS
  Nine patients with ruptured dissecting aneurysms of the PICA were treated with endovascular embolization at our facility from August 1997 to December 2011. A retrospective chart review study was conducted to examine the efficacy of endovascular treatment and clinical outcome.
  
  
  RESULTS
  The shape of the aneurysms was saccular in five cases, fusiform in three cases and an abrupt cut-off of the PICA in one case. Aneurysmal sac embolization was feasible in five cases and parent artery (PICA) occlusion was performed in four cases. Eight cases (89%) achieved good recovery (modified Rankin Score ≤ 2). There were no clinical/technical complications in this small series.
  
  
  CONCLUSIONS
  Endovascular treatment of ruptured dissecting aneurysms of the PICA is safe and efficient.
authors.affiliation: Division of Interventional Neuroradiology, David Geffen School of Medicine at UCLA, University of California, Los Angeles, California, USA.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Ishihara
authors.forename: Satoshi
authors.initials: S
authors.lastname: Tateshima
authors.forename: Reza
authors.initials: R
authors.lastname: Jahan
authors.forename: Nestor
authors.initials: N
authors.lastname: Gonzalez
authors.forename: Gary
authors.initials: G
authors.lastname: Duckwiler
authors.forename: Fernando
authors.initials: F
authors.lastname: Vinuela
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000784:Aortic Dissection / Q000473:pathology / Q000628:therapy*; D017542:Aneurysm, Ruptured / Q000473:pathology / Q000628:therapy*; D002526:Cerebellar Diseases / Q000473:pathology / Q000628:therapy; D002531:Cerebellum / Q000098:blood supply* / Q000473:pathology; D002533:Cerebral Angiography; D002560:Cerebrovascular Circulation; D015331:Cohort Studies; D004621:Embolization, Therapeutic / Q000379:methods*; D057510:Endovascular Procedures / Q000379:methods*; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D002532:Intracranial Aneurysm / Q000473:pathology / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013345:Subarachnoid Hemorrhage / Q000628:therapy; D060205:Therapeutic Occlusion; D016896:Treatment Outcome
keywords: Aneurysm; Dissection; Hemorrhage; Posterior fossa; Subarachnoid