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| - Treatment of basilar tip aneurysms with horizontal PCA to PCA stent-assisted coiling: case series
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| - Backgroun and objective. Coiling of wide-necked basilar tip aneurysms is technically challenging and is often assisted by the placement of a stent. Stent placement in an anterograde fashion either with a single or Y-stent is typical. However, in some cases the posterior cerebral artery (PCA) angle of origin at the base of the aneurysm precludes anterograde catheterization. A series of patients with wide-necked basilar tip aneurysms treated with a single stent placed via the posterior communicating artery from PCA to PCA is presented. Methods. A retrospective database review was performed to identify all stent-coiled basilar tip aneurysms. Patients with attempted horizontal P1-P1 stenting via the posterior communicating artery were identified. Procedural imaging, follow-up angiography and clinical notes were reviewed. Results. P1-P1 stenting was attempted in 10 patients and was successful in eight. Angiographic follow-up was available in six patients, all of whom had >90% obliteration at last follow-up. There was one procedure-related subarachnoid hemorrhage that resulted in patient death. There were no cases of significant PCA stenosis on angiographic follow-up. Conclusions. This stenting technique is an effective way to treat wide-necked basilar tip aneurysms but is limited by the anatomy of the posterior communicating arteries and P1 segments.
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