Abstract 130: Persistent ProAtlantal Artery With Moya Moya Disease : Case Report

The proatlantal intersegmental artery is also known as the type I proatlantal artery and is one of the persistent carotid‐vertebrobasilar anastomoses. It arises from the internal carotid artery (similar to the hypoglossal artery but instead of heading for the hypoglossal canal, it joins the vertebral artery through the foramen magnum. Carotid‐vertebral and carotid‐basilar anastomoses are present around 4‐5 weeks of embryogenesis. Their persistence post birth, commonly termed as persistent proatlantal artery (proA) is uncommon and oftentimes incidental. We report a unique case of persistent carotid‐vertebral artery with associated Moyamoya disease in a patient with acute ischemic infarct. To our knowledge, this is the only reported case of its kind with Moyamoya disease and persistent proA in the same patient.