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المستخلص
Together, the ACA and A-comm are the most common location for intracranial aneurysms, accounting for some 39% of all ruptured aneurysms . As the difference in diameter between the A1s increases, so does the size of the AComA. Thus, a large AComA is often associated with a significant difference in diameter between the right and left A1. This is understandable from a functional point of view because, with a small or hypoplastic A1, more collateral circulation flows across the AComA to make up the deficit