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Persistent primitive trigeminal artery aneurysm evaluated by MR imaging and angiography
1Department of Radiology, University of Utah, Salt Lake City 84132.
Abstract:
The primitive trigeminal artery is the most common of the persistent carotid-basilar anastomoses with an angiographic incidence of 0.6%. Fifteen cases of aneurysms of a persistent primitive trigeminal artery have been reported in the literature. A 16th patient is presented in whom an incidental trigeminal artery aneurysm and a thrombosed aneurysm of the vertebrobasilar system are evaluated by magnetic resonance imaging and angiography.
Insights
The primitive trigeminal artery, a common vascular connection, can develop aneurysms. This study presents a 16th case, highlighting imaging findings of a trigeminal artery aneurysm and a related vertebrobasilar aneurysm.
Area of Science:
- Vascular Neurology
- Neuroimaging
- Cerebrovascular Anatomy
Background:
- Persistent primitive trigeminal artery is the most common carotid-basilar anastomosis.
- It has an angiographic incidence of 0.6%.
- Aneurysms associated with this artery are rare, with only 15 prior cases reported.
Observation:
- A 16th patient with a persistent primitive trigeminal artery aneurysm is presented.
- The aneurysm was incidentally discovered.
- Magnetic resonance imaging and angiography were used for evaluation.
Findings:
- The patient presented with an incidental trigeminal artery aneurysm.
- A thrombosed aneurysm of the vertebrobasilar system was also identified.
- Imaging confirmed the presence and characteristics of both aneurysms.
Implications:
- This case adds to the limited literature on persistent primitive trigeminal artery aneurysms.
- It underscores the importance of advanced imaging in identifying complex cerebrovascular anomalies.
- Further research may elucidate the specific risks and management strategies for these rare aneurysms.