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Abstract

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Although the surgical technique of the management of an Middle cerebral
artery(MCA) aneurysm is not more difficult than that of an aneurysm in any other
location, the surgical management of this aneurysm is not better than that of other
location aneurysms. This is probably due to occurrence of an intracerebral hemorrhage
more frequently in an MCA aneurysm than other location aneurysms. This is required
the proper surgical management of this aneurysm to be reviewed.
The key points of surgery for MCA aneurysm can be summarized as follows : gently
wide dissection and splitting of the sylvian fissure without injury of main sylvian veins
; early adequate exposure of the M1 sites for temporary clips applications
; avoid injuries of small branches of the MCA in sylvian fissure by using a low
pressure suction during removing the intrasylvian hematoma ; avoid injury of
lenticulostriate arteries and narrowing of the parent arteries during clipping aneurysms ;
and successful aneurysm obliteration with minamal brain retraction . Preoperative
imagination of the configulation of aneurysm and the relationship between the aneurysm
and surrounding vessels, such as M1, M2 and lenticulostriate
arteries, from angiographic informations will decrease and incidence of premature
aneurysmal rupture during surgery and improve the surgical management outcome of
patients with MCA aneurysm.
From September 1982 to December 1998, the authors has surgically treated 1025
patients of the cerebral aneurysms. Among these patients, 274 patients(26.7%) had the
MCA aneurysms. The surgical outcome of these MCA aneurysm patients were good in
222 patients(81.0%) and death in 22 patients(8.0%).
The authors discusses surgical anatomy and techniques for the management of MCA
aneurysms on the basis of the author's experiences and a review of the literatures in
order to improve the surgical management outcomes of patients with MCA aneurysm in
the future.

Å°¿öµå

Cerebral aneurysm; Middle cerebral artery; Surgical anatomy; Surgical management; Outcome.;

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