Intracranial aneurysm on a persistent primitive trigeminal artery. Case report.

✓ The angiographic demonstration of a rare case of persistent trigeminal artery aneurysm is reported. The incidence of persistent trigeminal artery in the authors' series is 0.6%. Approximately 14% of patients with a persistent trigeminal artery also have an intracranial aneurysm. The embryology involved and related cases are reviewed.

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