Infraoptic course of anterior cerebral arteries associated with abnormal gyral segmentation

Case report

Nancy McLaughlin M.D. and Michel W. Bojanowski M.D., F.R.C.S.C.
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  • Division of Neurosurgery, Department of Surgery, Centre Hospitalier de l'Université de Montréal–Hôpital Notre-Dame, Montreal, Quebec, Canada
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✓ The authors report the case of a 34-year-old woman who presented with increasing headaches. Neuroimaging revealed bilateral anomalous vessels arising at the level of each ophthalmic artery, coursing rostromedially to join the anterior communicating artery (ACA), which harbored an aneurysm. Intraoperatively, the authors identified an abnormal gyral segmentation of the frontoorbital region, with a median gyrus separated from the olfactory tracts on each side by the gyrus rectus. No interhemispheric fissure was observed in the exposed area. This is the first report in the literature of an abnormal gyral segmentation in association with an infraoptic course of an ACA. Recognition of this possible gyral abnormality in association with this vascular anomaly is relevant for surgical exposure and treatment of aneurysms by clip placement.

Abbreviations used in this paper:ACA = anterior cerebral artery; ACoA = anterior communicating artery; ICA = internal carotid artery; MR = magnetic resonance; OA = ophthalmic artery.

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Contributor Notes

Address reprint requests to: Michel W. Bojanowski, M.D., F.R.C.S.C., Division of Neurosurgery, Centre Hospitalier de l'Université de Montréal–Hôpital Notre-Dame, 1560 Sherbrooke Street East, Montreal, Quebec, Canada H2L 4M1. email: michel.bojanowski.chum@ssss.gouv.qc.ca.
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