• Neurosurgery · Feb 2013

    Basilar tip aneurysms: a microsurgical and endovascular contemporary series of 100 patients.

    • Laligam N Sekhar, Farzana Tariq, Ryan P Morton, Basavaraj Ghodke, Daniel K Hallam, Jason Barber, and Louis J Kim.
    • Department of Neurosurgery, University of Washington, Seattle, Washington, USA. lsekhar@u.washington.edu
    • Neurosurgery. 2013 Feb 1;72(2):284-98; discussion 298-9.

    BackgroundEndovascular therapy has largely replaced microsurgical clipping for the treatment of basilar tip aneurysms.ObjectiveWe describe the variables our center evaluates when choosing to clip or coil basilar tip aneurysms and our outcomes. Four case illustrations are presented.MethodsAll patients with ruptured or unruptured basilar tip aneurysms from 2005 to April 2012 were examined. The patients were treated by 2 interventional neuroradiologists and 2 dually trained neurosurgeons.ResultsThere were 63 ruptured (clipped 38%, coiled 62%) and 37 unruptured (clipped 35%, coiled 65%) aneurysms in this 100-patient study. Seventy percent of the patients with ruptured aneurysms and 92% of the patients with unruptured aneurysms had a good outcome (modified Rankin scale 0-2) at 3 months. For ruptured aneurysms, there was a statistically significant difference in clipping and coiling with respect to age and treatment modality (clip 48.8 years, coil 57.6 years). Patients in the coiled group had higher dome-to-neck (1.3 vs 1.1) (P = .01) and aspect ratios (1.6 vs 1.2) (P = .007). In the ruptured coiling group, 69.5% achieved a Raymond 1 radiographic outcome, 28% Raymond 2, and 2.5% Raymond 3. Eleven (17.4%) patients required re-treatment, and 3 (4.4%) patients were re-treated more than twice. Coiling of unruptured aneurysms resulted in 75% Raymond 1. There were no residual lesions for unruptured clipped aneurysms. There were no differences in outcome between clipping and coiling in the ruptured and unruptured group.ConclusionIn our current management of basilar tip aneurysms, the majority can be treated via endovascular means, albeit with the expectation of a higher percentage of residual lesions and recurrences. Microsurgery is still appropriate for aneurysms with complex neck morphologies and in young patients desiring a more durable treatment.

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