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Endovascular treatment of basilar and ICA termination aneurysms: effects of the use of HydroCoils on treatment stability in a subgroup of patients prone to a higher recurrence rate

  • Interventional Neuroradiology
  • Published:
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Abstract

Purpose

The aim of this study was to evaluate the stability of occlusion of terminal bifurcation aneurysms after embolization with hydrogel-coated coils.

Methods

Of 35 bifurcation aneurysms, 34 were treated with hydrogel-coated coils in combination with platinum coils, and 1 was treated with hydrogel-coated coils only. Aneurysms were located at the basilar tip in 17 patients, and the internal carotid artery (ICA) bifurcation in 18 patients. The patient population consisted of 20 women and 15 men with ages ranging from 21 to 65 years. The aneurysm was found in 16 patients on presentation for subarachnoid hemorrhage, and in 19 patients the finding was incidental. Of the 35 aneurysms, 25 were small, 9 were large and 1 was giant. The giant aneurysm was located at the basilar tip and showed partial thrombosis. All except two basilar tip aneurysms were treated with balloon assistance. The remaining two basilar tip aneurysms were embolized with the assistance of an aneurysmal neck bridge device.

Results

The mean percentage occluded aneurysm volume for all devices was in the range 34–100%. Follow-up angiograms were obtained at 1 year in 6 patients, 2 years in 11 patients, and 3 years in 18 patients. Angiograms obtained immediately after embolization demonstrated a Raymond class 1 occlusion in 29 patients (82.9%) and a Raymond class 2 occlusion in 6 patients (17.1%). In four of these six patients follow-up angiograms demonstrated regrowth with resultant Raymond class 3 occlusion. In the other two patients, Raymond class 2 occlusion remained stable on follow-up angiograms. In patients who had a Raymond class 1 occlusion on the angiogram obtained immediately after embolization, no regrowth was seen on the follow-up angiograms. The overall recanalization rate was 11.4% (three large, one giant) at 6 months. Retreatment was not considered in three of these patients and they were to be followed; the other patient was retreated.

Conclusion

Our initial procedural data demonstrate that higher volumetric occlusion was achieved with hydrogel-coated coils and the long-term follow-up results showed a favorably low recanalization rates among the terminal bifurcation aneurysms.

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Authors and Affiliations

  1. Interventional Neuroradiology Unit, Radiology Department, Hacettepe University Hospital, Sihhiye, 06100, Ankara, Turkey

    Serdar Geyik, Kivilcim Yavuz, Saruhan Cekirge & Isil Saatci

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  1. Serdar Geyik
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  2. Kivilcim Yavuz
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  3. Saruhan Cekirge
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  4. Isil Saatci
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Correspondence to Isil Saatci.

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We declare that we have no conflict of interest.

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Geyik, S., Yavuz, K., Cekirge, S. et al. Endovascular treatment of basilar and ICA termination aneurysms: effects of the use of HydroCoils on treatment stability in a subgroup of patients prone to a higher recurrence rate. Neuroradiology 49, 1015–1021 (2007). https://doi.org/10.1007/s00234-007-0290-5

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  • DOI: https://doi.org/10.1007/s00234-007-0290-5

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