The azygos anterior cerebral artery is a rare variant, characterized by the absence of the anterior communicating artery and the union of two proximal segments of the anterior cerebral artery, forming a single trunk and ascending through the interhemispheric fissure. The incidence in the population varies from 0.3 to 2%. The presence of occlusion for this vessel causes bifrontal infarcts, with potentially devastating functional consequences, hence the importance of recognizing this anatomical variation in imaging exams.
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Sousa, C. S. M. de, Miranda, C. L. V. M. de, Avelino, M. C., Bastos, B. B., Moreira de Sousa, R. S., & Miranda, C. V. V. M. de. (2017). Thrombosis of the Azygos Anterior Cerebral Artery. Case Reports in Radiology, 2017, 1–3. https://doi.org/10.1155/2017/5409430
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