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[A ruptured choroidal artery aneurysm of the anterior inferior cerebellar artery obliterated via the endovascular approach: case report].
Intraventricular aneurysms associated with fourth ventricular hemorrhage are rare. A case of a ruptured aneurysm in a choroidal branch of the right anterior inferior cerebellar artery (AICA) is reported here. A 56-year-old man presented with sudden onset of vertigo and nausea. CT scan showed an intraventricular hemorrhage within the fourth ventricle. Cerebellar angiography showed an aneurysm at the choroidal artery branching from the right AICA. The patient rejected both general anesthesia and craniotomy, so endovascular embolization under local anesthesia was performed using Guglielmi detachable coils (GDCs) and a fibered platinum coil. The distal portion of the right AICA and the aneurysm were obliterated. His postoperative course was fairly satisfactory. He suffered from a minimal gait disturbance caused by truncal ataxia for several days after the operation. He was discharged from hospital without neurological deficit. There have been only a few articles about choroidal artery aneurysms. As treatment, direct surgery has been recommended in past cases, but endovascular embolization of the parent artery was successfully performed in this case. Not only direct surgery but also endovascular surgery may be regarded as the treatments of choice for intraventricular aneurysms, depending on the size of the parent artery.
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