Cervical rib

Dr Daniel J Bell and Radswiki et al.

Cervical ribs are supernumerary or accessory ribs arising from the seventh cervical vertebra. They occur in ~0.5% of the population, are usually bilateral, but often asymmetric 2, and are more common in females. 

Although cervical ribs are usually asymptomatic, they are the most important anatomic rib variant clinically, because they can cause thoracic outlet syndrome by compression of the brachial plexus or subclavian vessels.

Differential diagnosis

  • underdeveloped first thoracic rib
Anatomy: Spine
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Article information

rID: 12099
Section: Anatomy
Synonyms or Alternate Spellings:
  • Cervical ribs

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Cases and figures

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    Case 1
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    Cervical rib
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    B104 001

Thoraci...
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    Case 6
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    Case 7: bilateral
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    Case 8: bilateral on multiplanar CT
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    Case 10
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    Case 11: on left
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    Case 12: rudimentary assymetric cervical ribs
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