Table 1:

Location of 681 ruptured aneurysms treated with detachable coils

Posterior circulation (N = 181)
Basilar tip	109
Superior cerebellar artery	23
Posterior inferior cerebellar artery	26
Vertebral artery	8
Basilar trunk	8
Posterior cerebral artery	6
Anterior inferior cerebellar artery	1
Anterior circulation (N = 500)
Anterior communicating artery	244
Posterior communicating artery	123
Carotid tip	25
Carotid ophthalmic artery	15
Anterior choreoideal artery	13
Carotid hypophyseal artery	1
Middle cerebral artery	49
Pericallosal artery	29
Carotid cavernous sinus	1