Advanced

AJNR - American Journal of Neuroradiology

This Article Abstract Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Krishnamoorthy, T. Articles by Purkayastha, S. Search for Related Content PubMed PubMed Citation Articles by Krishnamoorthy, T. Articles by Purkayastha, S.

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

View larger version (118K): [in a new window]   Fig 1. A, Anteroposterior view with 15° caudal angulation of the left carotid arterial phase shows clearly the origin of the saccular aneurysm (arrowhead) from the left A1 segment. Note the filling of AComA (arrow) and right A2 segment (solid arrow). B, Left anterior oblique view of the left carotid arterial phase shows the medially directed saccular aneurysm (arrowhead) and the anomalous CMA (arrow). C, Same view as in Fig 1B with a mask from the late arterial frames shows the relationship of the saccular aneurysm and the anomalous CMA clearly. The superior course of the anomalous cortical artery (arrows) and the 3 branches (arrowheads) arising from it are seen. D, Lateral view of the left carotid arterial phase shows the pericallosal artery (open arrow). Note the absent CMA from the pericallosal artery. The superiorly coursing segment of the anomalous cortical artery can be visualized anteriorly (arrow). E, Lateral view of the left carotid late arterial phase shows the saccular aneurysm (open arrow) directed anteriorly. Note the anomalous cortical artery (arrows) initially coursing below the aneurysm, then ascending in front of it, and coursing all the way up to the level of coronal suture (solid arrow). F, Magnified lateral view of the left carotid late arterial phase clearly shows the parallel course of the anomalous CMA (arrow) to the pericallosal artery (open arrow).

View larger version (168K): [in a new window]   Fig 2. Magnified lateral view of the left carotid late arterial phase clearly traces the entire course of the anomalous cortical artery and branches arising from it (arrows). Note the anteriorly directed saccular aneurysm (solid arrow).