A 44-year-old patient developed paraplegia following rupture of an anterior communicating artery aneurysm. There was no evidence of any spinal lesion. Cerebral angiography showed a paired bihemispheric disposition of the A2 segment.
We report this case and consider the anatomical variants of the A2 segment described in literature.
The paired bihemispheric variant was reported in 21% of the cases. An azygos (unpaired) artery was observed in 5% and a triplicated A2 segment in 20% of the cases.
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