Document Detail

Origin of pretruncal nonaneurysmal subarachnoid hemorrhage: ruptured vein, perforating artery, or intramural hematoma?
MedLine Citation:
PMID:  11075747     Owner:  NLM     Status:  MEDLINE    
Pretruncal (perimesencephalic) nonaneurysmal subarachnoid hemorrhage (SAH) is a benign variant of SAH. Although angiography fails to show a source of the hemorrhage, mild basilar artery narrowing may be observed. The cause of pretruncal nonaneurysmal SAH has not been established. Recent imaging studies have demonstrated that the center of this type of SAH is not around the mesencephalon but is in the prepontine or interpeduncular cistern with the hemorrhage closely associated with the basilar artery. We review the possible sources of hemorrhage in these cisterns and hypothesize that pretruncal nonaneurysmal SAH is caused by a primary intramural hematoma of the basilar artery. Such an intramural hematoma would explain bleeding under low pressure, the location of the hemorrhage anterior to the brainstem, and the typical findings of hemorrhage adjacent to the basilar artery lumen on magnetic resonance imaging and mild basilar artery narrowing on angiography. Although an intramural hematoma of the basilar artery would be easily identified at surgical exploration, such surgeries have never included the extensive base-of-the-skull approaches that are necessary to visualize the artery in the prepontine cistern.
W I Schievink; E F Wijdicks
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Mayo Clinic proceedings     Volume:  75     ISSN:  0025-6196     ISO Abbreviation:  Mayo Clin. Proc.     Publication Date:  2000 Nov 
Date Detail:
Created Date:  2000-11-30     Completed Date:  2000-11-30     Revised Date:  2013-12-13    
Medline Journal Info:
Nlm Unique ID:  0405543     Medline TA:  Mayo Clin Proc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1169-73     Citation Subset:  AIM; IM    
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MeSH Terms
Basilar Artery
Hematoma / complications
Magnetic Resonance Imaging
Subarachnoid Hemorrhage / etiology*,  radiography

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

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