Abstract
BackgroundA duplicated middle cerebral artery arises from the internal carotid artery and supplies blood to the middle cerebral artery territory. A duplicated middle cerebral artery is sometimes associated with an intracranial aneurysm. Most aneurysms associated with duplicated middle cerebral artery are located at the origin of the duplicated middle cerebral artery. An aneurysm located at the distal middle cerebral artery is not common.Case presentationWe encountered a 62-year-old Asian man with duplicated middle cerebral artery associated with aneurysms at the M1/M2 junction of the duplicated middle cerebral artery and top of the internal carotid artery.ConclusionsIn cases of duplicated middle cerebral artery, association with a distal aneurysm on the duplicated middle cerebral artery is rare. However, the aneurysm may be formed on the thicker middle cerebral artery due to hemodynamic stress.
Highlights
A duplicated middle cerebral artery arises from the internal carotid artery and supplies blood to the middle cerebral artery territory
35 cases of duplicated MCA (DMCA) associated with aneurysms have been reported in the literature [6–11]
Most of the cases had an aneurysm at the origin of the DMCA, and an aneurysm located at the distal DMCA was not common
Summary
Some anomalies of the middle cerebral artery (MCA) have been reported on autopsy and radiological examinations [1]. 35 cases of DMCA associated with aneurysms have been reported in the literature [6–11]. To the best of our knowledge, only five cases of DMCA associated with distal MCA aneurysms have been reported. This patient had a small aneurysm at the top of the ipsilateral ICA In this case report, we describe the patient with DMCA, and aneurysms on the distal DMCA and top of the ICA, and discuss the radiological findings and characteristics of the rare vascular anomaly and associated aneurysms. There were no relatives with intracranial aneurysms His symptom was transient and had completely improved when he presented to our institution. Magnetic resonance angiography (MRA) revealed a left DMCA that originated from the ICA distal to
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