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Type 4 persistent primitive olfactory artery associated with contralateral accessory middle cerebral artery arising from the fenestrated segment of the distal anterior cerebral artery

  • Anatomic Variations
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Abstract

Persistent primitive olfactory artery (PPOA) is a rare variation of the proximal anterior cerebral artery (ACA) that generally follows an extreme anteroinferior course and takes a hairpin turn before continuing to the A2 segment of the ACA (type 1). There are four other types of extremely rare variations. The type 4 variation continues to the accessory middle cerebral artery (MCA) instead of the ACA. Only a few cases have been reported. We herein report a case of type 4 PPOA in which the contralateral side of the accessory MCA arose from the fenestrated segment of the distal ACA. No similar cases were found in the relevant English-language literature. For the identification of these variations on MR angiography, volume-rendering images were superior to maximum-intensity-projection images.

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Authors and Affiliations

  1. Department of Radiology, Saitama Sekishinkai Hospital, 2-37-20 Irumagawa Sayama, Saitama, 350-1305, Japan

    Akira Uchino

  2. Department of Neuroendovascular Therapy, Saitama Sekishinkai Hospital, Saitama, Japan

    Shoichiro Ishihara

Authors
  1. Akira Uchino
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  2. Shoichiro Ishihara
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AU carried out the study design and drafted the manuscript. All authors reviewed the manuscript critically, and have read and approved the final manuscript.

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Correspondence to Akira Uchino.

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Uchino, A., Ishihara, S. Type 4 persistent primitive olfactory artery associated with contralateral accessory middle cerebral artery arising from the fenestrated segment of the distal anterior cerebral artery. Surg Radiol Anat 43, 1951–1953 (2021). https://doi.org/10.1007/s00276-021-02831-5

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  • DOI: https://doi.org/10.1007/s00276-021-02831-5

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