Literature

A fenestration of the supraclinoid internal carotid artery (ICA) is a rare congenital condition. We report an aneurysm arising from the proximal end of an ICA fenestration that was treated by endovascular coiling. Three-dimensional rotational angiography of preoperative cerebral angiog-raphy provided an understanding of the complex anatomy of the aneur-ysms associated with the fenestration and may facilitate the clinical deci-sion regarding the treatment option. Endovascular coiling appears to be safe and effective for treating an aneurysm originating from a fenestra-tion on the supraclinoid ICA, which is a difficult lesion to treat using a conventional surgical approach. J Cerebrovasc Endovasc Neurosurg