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Free Content “True Fetal Posterior Cerebral Artery”: Rare Variant Mimics AVM on MRI

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A “true fetal posterior cerebral artery” is an extremely rare anatomic variant of the cerebral vasculature in which 2 independent posterior cerebral arteries are present; 1 arises from a persistent large primitive anterior choroidal artery and a second arises in the usual fashion. This case report demonstrates this diagnosis made using cerebral angiography in a young woman with nonspecific headaches whose MR imaging brain scan was originally interpreted as a brain arteriovenous malformation or dural arteriovenous fistula. Given the rarity of a true fetal posterior cerebral artery, awareness of this entity may make it discernible on cross-sectional imaging. In addition, it is important to be able to recognize this angiographically because this variant supplies posterior cerebral structures and should not be embolized.
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Keywords: AChA = anterior choroidal artery; PCA = posterior cerebral artery

Document Type: Research Article

Publication date: April 1, 2020

More about this publication?
  • Neurographics is the peer-reviewed, bimonthly educational journal of the American Society of Neuroradiology. The journal comprises articles selected from material presented at the ASNR Annual Meeting. Neurographics also publishes other high-quality submissions that are primarily educational and have a high emphasis on a pictorial approach. Neurographics offers CME credit for reading review articles and completing quiz-based self-assessment activities.

    Visit the ASNR Education Connection to view all available CME courses.

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