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Updated: Mar 28, 2026

Microsurgical Clip Obliteration of Middle Cerebral Aneurysm Using Intraoperative Flow Assessment
Published on: September 25, 2009
Aneurysm at origin of duplicated middle cerebral artery associated with another aneurysm
Yu Iida1, Akira Tamase1, Tomoya Kamide1
1Department of Neurosurgery, Yokohama Sakae Kyosai Hospital, Sakae-ku, Yokohama 247-8581, Japan.
Background:
A duplicated middle cerebral artery (DMCA) is a rare vessel anomaly. Aneurysms at the origin of DMCA have been reported.
Case Description:
We report 2 cases of aneurysms at the origin of DMCA accompanied by aneurysms at different sites. Each case of ruptured and unruptured aneurysm at the DMCA origin was associated with an unruptured aneurysm at the ipsilateral internal carotid artery and a ruptured one at the ipsilateral MCA, respectively. The aneurysms were clipped successfully in both patients.
Conclusion:
In cases of DMCA aneurysm associated with an aneurysm at another site, either aneurysm has a high risk of rupture. In such a case, radical treatment is necessary.
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