Basilar artery fenestration and aneurysms with subarachnoid hemorrhage
Diagnosis certain
Presentation
Unconscious collapse.
Patient Data
Age: 60 years
Gender: Female
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Hyperdensity inseparable from the prepontine basilar artery, suspicious for aneurysm. A small volume of subarachnoid hemorrhage in the Sylvian fissures and at the vertex as well as a small volume of intraventricular blood in the left trigone.
Incidental bilateral choroid plexus xanthogranuloma.
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Basilar artery fenestration with anteriorly (larger) and posteriorly projecting aneurysm at the vertebrobasilar junction.
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DSA confirms basilar artery fenestration and aneurysm.
Case Discussion
Basilar artery fenestration is not uncommon and is usually an anatomical variant although there is an increased incidence of cerebral aneurysm.