Monolateral type i proatlantal artery with bilateral absence of vertebral arteries: Description of a case and review of the literature

M. Montechiari, A. Iadanza, A. Falini, L. S. Politi

Research output: Contribution to journalArticle

Abstract

We report a case of a patient with right type I proatlantal intersegmental artery associated with right fetal posterior cerebral artery and absence of both vertebral arteries and of the left posterior communicating artery. We also describe the clinical relevance of these findings for this patient. A 56-year-old woman with vertigo and tinnitus underwent contrast enhanced Magnetic Resonance Angiography (MRA) of the supra-aortic arteries using a 1.5 Tesla scanner. Maximum intensity projection and volume rendering reconstructions were obtained. MRA demonstrated the persistence of an anastomotic artery between the right internal carotid artery and basilar artery, passing through the foramen magnum, suggesting a type I proatlantal intersegmental artery. The examination also showed the absence of both vertebral arteries and the presence of a right fetal-type posterior cerebral artery. To our knowledge, this is the first report of a type I proatlantal intersegmental artery associated with an omolateral fetal-type posterior cerebral artery and the absence of both vertebral arteries and of the left posterior communicating artery. This condition requires a watchful monitoring of the patient and has to be considered in case of surgical procedures of the carotid arteries.

Original languageEnglish
Pages (from-to)863-865
Number of pages3
JournalSurgical and Radiologic Anatomy
Volume35
Issue number9
DOIs
Publication statusPublished - Nov 2013

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Keywords

  • Developmental anomaly
  • Fetal-type posterior cerebral artery
  • Posterior communicating artery
  • Proatlantal artery
  • Vertebrobasilar communications

ASJC Scopus subject areas

  • Anatomy
  • Radiology Nuclear Medicine and imaging
  • Pathology and Forensic Medicine
  • Surgery

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