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E3290. Normal Variant of Cerebral Arteries: Anterior Circulation

Youssef E,  Moawad S,  Bazerbashi M,  Buehler M,  Elsamaloty H. University of Toledo Medical Center, Toledo, OH

Address correspondence to H. Elsamaloty (

Background Information: With the advance of the imaging techniques and the significant increase in the number of CT performed, larger number of anatomical variants have been detected. CT angiography is the standard of care for evaluating all stroke cases and the anatomical variations of cerebral arteries are common. The normal variants maybe fenestrations, duplications, aplasia, hypoplasia or a persistent fetal origin. Adequate knowledge of the location, clinical symptoms and associated finding of these variants improves CT interpretation and avoids medical errors and faulty diagnosis.

Educational Goals/Teaching Points: We review the normal cerebral artery anatomy and illustrate the different variants and frequency of the anterior cerebral circulation. Participants will recognize the normal variants on digital subtraction angiography images and understand the possible related clinical symptoms caused by the different variants.

Key Anatomic/Physiologic Issues and Imaging Findings/Techniques: The presentation will be supported by multiple cases from our institution. We will present the different variants, as well as, the possibly associated clinical symptoms for each variant. A correlation of CTA images with digital subtraction angiography will also be provided for better demonstration. 3D reconstruction of CT angiography images will be presented.

Conclusion: The different variants of the anterior cerebral circulation are not rare and could be symptomatic or associated with increased risk of aneurysm formation. A better understanding of anterior cerebral arteries normal variants is needed to aid in diagnosis and treatment of the few relevant clinical symptoms.