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  • Title: Surgical Clipping of an Unruptured Large Inferiorly Projecting Anterior Communicating Artery Aneurysm With Chiasmopathy: 2-Dimensional Operative Video.
    Author: Hendricks BK, Spetzler RF.
    Journal: Oper Neurosurg (Hagerstown); 2020 Aug 01; 19(2):E144. PubMed ID: 32348502.
    Abstract:
    Anterior communicating artery (ACoA) aneurysms are a frequently encountered cerebrovascular entity that is associated with a high rupture rate at a smaller size and debilitating morbidity and mortality following rupture. The surgical management of ACoA aneurysms is highly dependent on the spatial orientation of the saccular projection, which is categorized as inferior, superior, anterior, or posterior. The inferiorly projecting aneurysms constitute a minority of all aneurysms involving the ACoA. The adherence of the aneurysm dome near the chiasm predisposes these patients to dome avulsion during frontal lobe retraction. This patient presented with a 1-mo history of progressive vision loss and was found to have a large inferiorly projecting ACoA saccular aneurysm measuring 2.04 cm × 1.54 cm with resultant chiasmopathy. The lesion was approached via a right modified orbitozygomatic craniotomy, which can provide a more favorable maximal angle of approach to the ACoA complex to avoid brain retraction. Intraoperative adenosine was administered to provide relaxation of the aneurysm dome to augment clip placement. Postoperatively, the patient's chiasmopathy demonstrated near-complete resolution. The patient gave informed consent for surgery and video recording. Institutional review board approval was deemed unnecessary. Used with permission from Barrow Neurological Institute, Phoenix, Arizona.
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