Intra-aneurysmal Onyx embolization for distal aneurysms of the cerebellar arteries

Neurol Res. 2012 Mar;34(2):211-6. doi: 10.1179/1743132811Y.0000000076. Epub 2012 Feb 3.


Background: Distal cerebellar artery aneurysms are difficult to treat both surgically and endovascularly. The purpose of this study is to assess the efficacy and safety of intra-aneurysmal Onyx embolization of these lesions with parent artery preservation.

Methods: Ten consecutive patients harboring 10 distal cerebellar aneurysms were treated with intra-aneurysmal Onyx embolization. Locations of the aneurysms were as follows: superior cerebellar artery in three patients, anterior inferior cerebellar artery in two, and posterior inferior cerebellar artery in five. The technical feasibility of the procedure, procedure-related complications, angiographic results, and clinical outcome were evaluated.

Results: In every case, endovascular treatment was achieved. Immediate angiography demonstrated that all of 10 aneurysms were completely occluded, with parent artery preservation in nine of them. Procedure-related complication occurred in one patient with transient neurological sequelae. None of the treated aneurysms experienced rebleeding or recanalization during the follow-up time (mean, 12·7 months).

Conclusion: We found that the intra-aneurysmal Onyx embolization was helpful in the treatment of distal cerebellar aneurysms in which selective occlusion of the aneurysmal sac with coils or open clipping cannot be achieved.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Aged
  • Cerebellum / blood supply
  • Cerebellum / diagnostic imaging
  • Cerebellum / pathology
  • Cerebral Angiography
  • Cerebral Arteries / diagnostic imaging
  • Cerebral Arteries / pathology*
  • Cerebral Arteries / surgery*
  • Drug Combinations
  • Embolization, Therapeutic / methods*
  • Female
  • Humans
  • Intracranial Aneurysm / diagnostic imaging
  • Intracranial Aneurysm / therapy*
  • Male
  • Middle Aged
  • Polyvinyls / therapeutic use*
  • Tantalum / therapeutic use*


  • Drug Combinations
  • Onyx 18
  • Polyvinyls
  • Tantalum