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Dural arteriovenous malformations and intracranial hemorrhage
Neurosurgery
|September 1, 1984
Summary
Dural arteriovenous malformations (AVMs) outside major venous sinuses carry a high risk of intracranial hemorrhage. These uncommon AVMs, particularly those with leptomeningeal venous drainage, require careful consideration due to their bleeding propensity.
Area of Science:
- Neurology
- Neurosurgery
- Vascular Malformations
Background:
- Dural arteriovenous malformations (AVMs) are vascular malformations affecting the dura mater.
- Intracranial hemorrhage is a known complication, but its frequency varies with AVM location and type.
Observation:
- This study reviewed 10 patients with dural AVMs, noting 6 cases of intracranial hemorrhage.
- A literature search identified 27 additional hemorrhage cases from 213 reported dural AVMs.
- Hemorrhage occurred in 7.5% of dural AVMs within a major venous sinus versus 51% outside a major sinus.
Findings:
- Dural AVMs located outside major venous sinuses are uncommon but demonstrate a significant propensity for intracranial hemorrhage.
- Leptomeningeal venous drainage was present in all hemorrhage cases.
- Large variceal dilatation was observed in 42% of hemorrhage cases.
Implications:
- Dural AVMs outside major venous sinuses represent a distinct subgroup with a higher risk of bleeding.
- These findings underscore the importance of early diagnosis and management for dural AVMs located outside venous sinuses.
- Further research into the specific mechanisms driving hemorrhage in these lesions is warranted.