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Published on: September 25, 2009
Ruptured True Anterior Choroidal Artery Aneurysm in Cisternal Segment
Hiroshi Yokota1, Hiroshi Noguchi1, Kazuhiro Yokoyama1
1Department of Neurosurgery, Higashiosaka City General Hospital, Osaka, Japan.
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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