The authors describe a case of giant fusiform aneurysm of the basilar
artery presenting with ischemic symptoms. Angiography and CT revealed
vertebro-basilar fusiform aneurysmal dilatation. Fusiform vertebro-bas
ilar aneurysm is associated with various complications particularly br
ain stem infarction. Similar lesions in the literature are reviewed an
d the relationship between this clinical entity andcerebral ischemia,
particularly brainstem infarction are discussed.