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Updated: Aug 15, 2026

Microsurgical Clip Obliteration of Middle Cerebral Aneurysm Using Intraoperative Flow Assessment
Published on: September 25, 2009
Multiple aneurysms arising from the origin of a duplication of the middle cerebral artery
Emiko Hori1, Kunikazu Kurosaki, Nobuhisa Matsumura
1Department of Neurosurgery, Toyama Red Cross Hospital, University Toyama, Japan. ehori-tym@umin.ac.jp
Abstract:
Duplication of the middle cerebral artery is an anomalous vessel arising from the internal carotid artery. There have only been 14 reports of aneurysms arising from the origin of a duplication of the middle cerebral artery and 5 of these patients had multiple aneurysms. Aneurysms at this site have a high rupture rate compared to aneurysms in other locations and aggressive management is indicated.
Insights
Duplication of the middle cerebral artery, a rare condition, is linked to a high rate of dangerous aneurysms. Early and aggressive treatment is crucial for patients with this vascular anomaly.
Area of Science:
- Neurology
- Vascular Surgery
- Radiology
Background:
- Duplication of the middle cerebral artery (MCA) is a rare congenital anomaly originating from the internal carotid artery.
- Aneurysms associated with MCA duplication are infrequently reported, posing unique clinical challenges.
Observation:
- A review of literature identified 14 cases of aneurysms at the origin of MCA duplication.
- Notably, 5 of these patients presented with multiple intracranial aneurysms.
Findings:
- Aneurysms arising from MCA duplication demonstrate a significantly higher rupture rate compared to aneurysms at other cerebral locations.
- The complex anatomy may predispose these lesions to rupture.
Implications:
- Aggressive management strategies are indicated for aneurysms associated with MCA duplication due to their high rupture risk.
- Further research into the specific pathophysiology and optimal treatment of these rare aneurysms is warranted.
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