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Atypical intracranial aneurysms are due to various specific causes, such as spontaneous or traumatic arterial dissection, infectious arteritis, and neoplasia. The pathophysiology and presentation of these aneurysm types as well as giant serpentine aneurysms are presented because these aneurysms now can be treated by endovascular techniques. These techniques involve packing the aneurysm sac with embolic devices or occluding the aneurysm-bearing artery to induce thrombosis. Endovascular stents have been introduced to allow wide-necked atypical aneurysms to be embolized while preserving the parent artery. Endovascular options are discussed for each type of atypical aneurysm together with their role in the overall management of patients with these uncommon lesions. (C) 2000 by W.B. Saunders Company.

Original publication




Journal article


Operative Techniques in Neurosurgery

Publication Date





206 - 213