Unilateral segmental agenesis of the vertebral artery at the C2 level

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Abstract

Purpose: To report a case of unilateral segmental agenesis of the vertebral artery (VA). Methods: We describe the angiographic and MRI features of a segmental VA agenesis (C2 segment). Results: VA agenesis is caused by the absence of the anastomotic connection normally linking two adjacent intersegmental arteries; in the reported observation, a paravertebral extraforaminal anastomosis replaced the C2 segment normally joining the 1st and 2nd cervical intersegmental arteries through the C2 transverse foramen. Conclusion: We present an observation of segmental VA agenesis. This variant is consistent with the developmental history of the VA. It appears exceptional but is more likely underappreciated.

Original languageEnglish (US)
JournalSurgical and Radiologic Anatomy
DOIs
StateAccepted/In press - Jan 1 2019

Keywords

  • Anatomical variation
  • Angiography
  • Arteries
  • Vertebral artery

ASJC Scopus subject areas

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

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