Document Detail

Saccular aneurysms of the proximal (M1) segment of the middle cerebral artery.
MedLine Citation:
PMID:  7753343     Owner:  NLM     Status:  MEDLINE    
We report A series of 20 consecutive patients with 21 saccular aneurysms of the proximal (M1) segment of the middle cerebral artery. The incidence of M1 aneurysms was 3.0% among 660 patients with intracranial aneurysms and 12.9% among 155 patients with middle cerebral artery aneurysms in our center. Of the 20 patients, 2 were men and 18 were women. The aneurysms were classified into two types: the superior wall type (9 cases), arising at the origin of the lenticulostriate or fronto-orbital artery, and the inferior wall type (12 cases), arising at the origin of the early temporal branches. Twelve (60%) patients had ruptured M1 aneurysms. The incidence of multiple aneurysms was high (nine patients, 45%), and M1 aneurysms were responsible for subarachnoid hemorrhage in four patients. Of 14 M1 aneurysms greater than 5 mm in diameter, 11 (78.6%) ruptured. In contrast, only one (14.3%) of seven small (< or = 5 mm) aneurysms ruptured. In 12 patients with ruptured M1 aneurysms, intracerebral hematomas were recognized in 6 (50%). Intracerebral hematomas by the superior wall M1 aneurysms were located in the frontal lobe, and those by the inferior wall M1 aneurysms were in the temporal lobe. Fifteen patients (75%) made a useful recovery 6 months after surgery. Four patients (20%), who were in poor grade condition preoperatively, remained severely disabled. One patient died of sepsis 2 months after she recovered well from the operation. Special attention to the lenticulostriate arteries to avoid injury is critical for successful surgical treatment.
K Hosoda; S Fujita; T Kawaguchi; Y Shose; S Hamano
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Neurosurgery     Volume:  36     ISSN:  0148-396X     ISO Abbreviation:  Neurosurgery     Publication Date:  1995 Mar 
Date Detail:
Created Date:  1995-06-22     Completed Date:  1995-06-22     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7802914     Medline TA:  Neurosurgery     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  441-6     Citation Subset:  IM    
Department of Neurosurgery, Hyogo Brain and Heart Center, Himeji, Japan.
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MeSH Terms
Aged, 80 and over
Cerebral Arteries / pathology*,  radiography,  surgery
Intracranial Aneurysm / pathology*,  radiography,  surgery
Middle Aged
Rupture, Spontaneous
Subarachnoid Hemorrhage / etiology
Tomography, X-Ray Computed
Treatment Outcome
Erratum In:
Neurosurgery 1995 May;36(5):1051

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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