Neurosurgery
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Very small anterior communicating artery aneurysms (vsACoA) of <5 mm in size are detected in a considerable number of patients with aneurysmal subarachnoid hemorrhage (aSAH). Single-center studies report that vsACoA harbor particular risks when treated. ⋯ Very small ruptured ACoA have a higher in-hospital rebleeding rate but are not associated with worse morbidity or mortality.