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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 27:2075-2077, November-December 2006
© 2006 American Society of Neuroradiology

Case Report
INTERVENTIONAL

Anomalous Origin of the Callosomarginal Artery from the A1 Segment with an Associated Saccular Aneurysm

T. Krishnamoorthy^a, A.K. Gupta^a, R.N. Bhattacharya^b, B.J. Rajesh^b and S. Purkayastha^a

^a Departments of Imaging Sciences and Interventional Radiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
^b Department of Neurosurgery, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India

Please address correspondence to Thamburaj Krishnamoorthy, MD, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India 695011; e-mail: b_krish1{at}yahoo.co.in

SUMMARY: Although anatomic variations are well known in the A1 segment of the anterior cerebral artery (ACA), anomalous origin of a cortical artery from the A1 segment is extremely rare. The only reported cortical branch to arise from the A1 segment is the fronto-orbital artery. We report a case of anomalous origin of the callosomarginal artery (CMA) in association with a saccular aneurysm from the A1 segment of the left ACA in a 35-year-old man who presented with intracerebral hemorrhage. To our knowledge, this is the first report of anomalous origin of the CMA from the A1 segment.