View source for Cervical rib

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{{Infobox_Disease |
  Name           = {{PAGENAME}} |
  Image          = |
  Caption        = |
  DiseasesDB     = 2317 |
  ICD10          = Q76.5 |
  ICD9           = {{ICD9|756.2}} |
  ICDO           = |
  OMIM           = 117900 |
  MedlinePlus    = |
  MeshID         = |
}}

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==Overview==

A '''cervical rib''' is a [[supernumerary body part|supernumerary (extra)]] [[rib]] which arises from the seventh [[cervical vertebra]]. It is a [[congenital]] abnormality located above the normal first rib.

==Epidemiology and Demographics==
A cervical rib is present in only about 1 in 200 (0.5%) of people; in even rarer cases, an individual may have not one but two cervical ribs.

==Natural History, Complications, and Prognosis==
The presence of a cervical rib can cause a form of [[thoracic outlet syndrome]] due to compression of the [[brachial plexus]] or [[subclavian artery]].  Compression of the brachial plexus may be identified by weakness of the muscles around the muscles in the hand, near the base of the thumb.  Compression of the [[subclavian artery]]  is often diagnosed by finding a positive [[Adson's sign]] on examination, where the radial [[pulse]] in the arm is lost during abduction and external rotation of the shoulder.

<gallery>
Image:

Cervical-ribs-001.jpg|Cervical rib chest X-ray

</gallery>

==References==
{{reflist|2}}

==Anatomy Diagrams==
* [http://www.backpain-guide.com/Chapter_Fig_folders/Ch08_Congen_Folder/Ch08_Images/08-7_Vert_NumbAbn.jpg Detailed diagrams of a cervical rib]

{{Congenital malformations and deformations of musculoskeletal system}}

[[Category:Supernumerary body parts]]
[[Category:Disease]]

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