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  • Title: Ruptured True Anterior Choroidal Artery Aneurysm in Cisternal Segment.
    Author: Yokota H, Noguchi H, Yokoyama K.
    Journal: World Neurosurg; 2016 Jun; 90():701.e11-701.e13. PubMed ID: 26906898.
    Abstract:
    BACKGROUND: Rupture of a true anterior choroidal artery (AChA) aneurysm in the cisternal segment is extremely rare, whereas cases of a distal AChA aneurysm associated with moyamoya disease are increasingly reported. CASE DESCRIPTION: A 58-year-old woman presented with a severe headache and vomiting. Computed tomography demonstrated a subarachnoid hemorrhage without intraventricular or intracerebral hemorrhaging. Cerebral angiogram findings revealed a proximal AChA aneurysm mimicking an internal carotid artery aneurysm at the origin of the AChA. Intraoperative findings demonstrated a ruptured aneurysm located on a bend of the proximal AChA in the carotid cistern. Neck clipping of the aneurysm with preservation of the AChA led to a good outcome. CONCLUSIONS: A rare case of ruptured true AChA aneurysm in the cisternal segment, unrelated to moyamoya disease, is presented as a cause of subarachnoid hemorrhage.
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