Transpetrosal approach for aneurysms of the lower basilar artery

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✓ Extradural subtemporal access to the petrosal ridge and a resection of the anterior pyramidal bone produced direct observation of the lower basilar artery, with minimum retraction of the temporal lobe and preservation of the temporal bridging veins. Two patients, with lower basilar trunk aneurysms facing toward the brain stem, were operated on by the “transpetrosal approach,” with successful clipping of the aneurysms. Auditory function was preserved in one case. This approach decreases the possibility of retraction damage to the temporal lobe, brain stem, or cranial nerves, and may be helpful for surgery of aneurysms arising around the vertebrobasilar junction or at the origin of the anterior inferior cerebellar artery.

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Contributor Notes

Address reprint requests to: Takeshi Kawase, M.D., Department of Neurosurgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160, Japan.

© AANS, except where prohibited by US copyright law.

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