Vertebral artery loop formation

Dr Henry Knipe and Dr Yuranga Weerakkody et al.

Vertebral artery loop formations occur when a portion of the vertebral artery contains an unusual coil. It can be a rare anatomical variant or can be acquired.

Vertebral artery loops tend to be mostly diagnosed in the 5th and 6th decades. Its prevalence is uncertain but is thought to be present in <3% of patients 2.

Its exact etiology is uncertain. Some propose an association with spondylotic changes or trauma, whilst others suggest hypertension and atherosclerosis may be responsible 2.

It can be capable of causing bony erosion, encroachment on the cervical neural exit foramen, neurovascular compression, or vertebrobasilar insufficiency

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Article information

rID: 61571
System: Vascular, Spine
Tag: cases
Synonyms or Alternate Spellings:
  • Vertebral arterial loop formation (VALF)
  • Vertebral artery loop formation (VALF)

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Cases and figures

  • Case 1
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  • Case 2
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