title: Endovascular coil embolization of very small intracranial aneurysms.
abstract: OBJECTIVE
  We aimed to evaluate the results of endovascular coil embolization for very small aneurysms (<or= 3 mm).
  
  
  METHODS
  Between March 2005 and December 2008, a total of 31 very small aneurysms in 30 patients were treated by coil embolization. Of the 31 aneurysms, five (16%) were ruptured, as opposed to 26 (84%) that were not. We assessed the procedural complications, immediate angiographic outcome after coiling, clinical outcome, and follow-up MR angiography (MRA).
  
  
  RESULTS
  Two thromboembolic complications occurred during the procedure, but did not lead to any persistent neurologic deficit. No procedural aneurysmal rupture was observed and procedure-related morbidity and mortality were both 0%. Occlusion was adequate in 25 aneurysms (81%) and incomplete in six aneurysms (19%). The clinical outcomes of five patients with ruptured aneurysms were good (Glasgow outcome scale >or= 4), with no bleeding of the treated aneurysms during a mean follow-up period of 13.3 months. On 27 follow-up MRA, there was no recurrence, and the five incompletely occluded aneurysms showed a spontaneous amelioration resulting in an adequate occlusion.
  
  
  CONCLUSIONS
  Coil embolization of very small aneurysms is technically feasible with good results. The long-term efficacy and the potential as a standard treatment strategy remain to be determined by randomized large trials.
authors.affiliation: Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors.forename: Kil Sung
authors.initials: KS
authors.lastname: Chae
authors.forename: Pyoung
authors.initials: P
authors.lastname: Jeon
authors.forename: Keon Ha
authors.initials: KH
authors.lastname: Kim
authors.forename: Sung Tae
authors.initials: ST
authors.lastname: Kim
authors.forename: Hyung Jin
authors.initials: HJ
authors.lastname: Kim
authors.forename: Hong Sik
authors.initials: HS
authors.lastname: Byun
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017542:Aneurysm, Ruptured / Q000628:therapy*; D002533:Cerebral Angiography; D004621:Embolization, Therapeutic / Q000379:methods*; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000628:therapy*; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome
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