Journal of Korean Neurosurgical Society

The Korean Neurosurgical Society (대한신경외과학회)
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Treatment Outcomes with Selective Coil Embolization for Large or Giant Aneurysms : Prognostic Implications of Incomplete Occlusion

  • Jo, Kyung Il (Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Yang, Na-Rae (Department of Neurosurgery, Ewha Womans University School of Medicine, Mokdong Hospital) ;
  • Jeon, Pyoung (Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Kim, Keon Ha (Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Hong, Seung-Chyul (Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Kim, Jong Soo (Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine)
  • Received : 2016.01.27
  • Accepted : 2017.03.27
  • Published : 2018.01.01
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Abstract

Objective : The objectives of this study were to evaluate the immediate and long-term efficacy and safety of coil embolization for large or giant aneurysms. Methods : One hundred and fifty large or giant aneurysm cases treated with endovascular coil embolization between January 2005 and February 2014 at a single institute were included in this study. Medical records and imaging findings were reviewed. Statistical analysis was performed to evaluate prognostic factors associated with major recurrence (major recanalization or rupture) and delayed thromboembolism after selective coil embolization. Results : Procedure-related symptomatic complications occurred in five (3.3%) patients. The mean clinical and radiological follow-up periods were 38 months (range, 2-110) and 26 months (range, 6-108), respectively. During the follow-up period, the estimated recurrence rate was 4.6% per year. Multivariate analysis using Cox regression showed the degree of occlusion to be the only factor associated with recurrence (p=0.008, hazard ratio 3.15, 95% confidence interval 1.34-7.41). The patient's history of rupture in addition to the size and location of the aneurysm were not associated with recurrence in this study. Delayed infarction occurred in eight cases, and all were incompletely occluded. Conclusion : Although immediate postprocedural safety profiles were reasonable, longterm results showed recanalization and thromboembolic events to occur continuously, especially in patients with incomplete occlusion. In addition, incomplete occlusion was associated with delayed thromboembolic complications. Patients with incomplete occlusions should be followed carefully for delayed recurrence or delayed thromboembolic events.

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References

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