Giant intracranial aneurysms: a review of 13 cases.

Thirteen cases of subarachnoid, extracavernous giant aneurysms are reported. The various types of presentation and treatment are discussed. Of interest is the fact that the paraclinoid carotid artery is the most common location for giant aneurysms. Thirty-one percent have another vascular abnormality associated with them, and 70% presented initially with a subarachnoid hemorrhage.