Abstract 366: Persistent Proatlantal Artery (type 2) Associated with Anterior Communicating Artery Aneurysm

Persistent carotid‐basilar anastomoses include a variety of anatomic variants of vasculature between the anterior and posterior circulation of the brain that arises from abnormal embryological development of the vertebrobasilar system. Some of the variants include persistent trigeminal artery, persistent otic artery, persistent hypoglossal artery, and persistent proatlantal artery. Very few cases of persistent carotid‐basilar anastomosis associated with intracranial aneurysms have been reported. Our case involves the persistent proatlantal artery (type II) associated with an anterior communicating artery (ACOM) aneurysm.