Presentation
Vascular anatomical variant within the vessels of the circle of Willis.
Patient Data
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No steno-occlusive disease or an intracranial aneurysm is demonstrated on time-of-flight MRA. Incidental note of duplicated left middle cerebral artery.
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No steno-occlusive disease or an intracranial aneurysm is demonstrated on CTA. Incidental note of duplicated left middle cerebral artery. Mildly degraded arterial study due to venous penetration.
Case Discussion
This case illustrates an anatomical variant characterized by two large vessels originating from the distal end of the internal carotid artery, a condition named as duplicated middle cerebral artery. This must be differentiated from another variant in which the anomalous vessel originates from the anterior cerebral artery, named as the accessory middle cerebral artery.
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