Median artery of the corpus callosum
Young female with severe headache. History of subarachnoid hemorrhage few months ago.
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CTA shows three A2 segments or trifurcation of anterior cerebral artery (ACA).
The central (anomalous) one arises from the anterior comminucating artery (ACOM) and is known as a median artery of the corpus callosum.
No saccular or fusiform aneurysm was found.
This anomaly occurs in 3% of population. As with other anterior cerebral artery (ACA) anomalies there is an increased incidence of cerebral aneurysm.