Giant aneurysm of anterior ethmoidal artery presenting with intracranial hemorrhage

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Abstract
This forty-five-year-old woman presented with a history suggestive of an intracranial hemorrhage. Clinical examination indicated mild right pyramidal signs and neck stiffness. Computerized tomography demonstrated contrast enhancement in the region of a left frontal intraparenchymal hematoma with an adjacent subdural hematoma. Angiography revealed the presence of a giant aneurysm on the left anterior ethmoidal artery. Surgical evacuation of the hematoma with excision of the aneurysm and coagulation of the feeding artery was achieved. Postoperative recovery was uneventful. Vascular lesions of the anterior ethmoidal artery and the rarity of a giant aneurysm at this site are discussed.