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FIG 5. Configurations of accessory MCAs and LSAs.
A, Accessory MCA of distal origin arising from the A2 segment of the ACA gives off an LSA (arrow).
B, Accessory MCA of proximal origin arising from proximal A1 segment of the ACA gives off LSAs (arrow).
C, Accessory MCA of distal origin gives off a recurrent artery of Heubner (arrow). A separate LSA (arrowhead) arises from the MCA.
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