title: Clinical and radiogical outcomes of endovascular detachable coil embolization in paraclinoid aneurysms : a 10-year experience.
abstract: OBJECTIVE
  Direct surgical clipping of paraclinoid aneurysms poses technical challenges to even very experienced neurosurgeons, making endovascular treatment an alternative treatment modality in many centers. We have therefore retrospectively evaluated the safety and efficacy of endovascular detachable coil embolization of paraclinoid aneurysms.
  
  
  METHODS
  From June 1997 to June 2007, 65 patients underwent endovascular detachable coiling for 67 paraclinoid aneurysms (of which 9 were ruptured and 58 were unruptured) in our institute. Their medical records, radiological images and readings, and operation records were reviewed retrospectively.
  
  
  RESULTS
  After the initial embolization procedure, complete occlusion was achieved in 29 (43.3%) of the aneurysms treated by endovascular detachable coiling. Six aneurysms required retreatment, with two each requiring one, two, or three additional endovascular procedures. Fifty-five (82.1%) aneurysms were measured by three-dimensional time of flight (TOF) magnetic resonance images (MRI) or transfemoral cerebral angiography (TFCA) at a mean follow-up of 29.7 months (range from 4 to 94 months), with 39 aneurysms (70.9%) showing complete occlusion. Thromboembolic events (3.8%) were the most frequent complication. Rupture did not occur during or after any of the procedures. According to the Glasgow Outcome Scale (GOS), 98.4% of the patients treated by coil embolization had a score of 4 or 5.
  
  
  CONCLUSIONS
  Our results indicate that endovascular detachable coiling is a safe and effective treatment modality in paraclinoid aneurysms.
authors.affiliation: Department of Neurological Surgery, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
authors.forename: Sung-Chul
authors.initials: SC
authors.lastname: Jin
authors.forename: Do Hoon
authors.initials: DH
authors.lastname: Kwon
authors.forename: Jae-Sung
authors.initials: JS
authors.lastname: Ahn
authors.forename: Byung-Duk
authors.initials: BD
authors.lastname: Kwun
authors.forename: Young
authors.initials: Y
authors.lastname: Song
authors.forename: Choong-Gon
authors.initials: CG
authors.lastname: Choi