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vertebra
(redirected from block vertebra)

   Also found in: Dictionary/thesaurus, Medical, Encyclopedia, Wikipedia 0.02 sec.

vertebra

In anatomy, an irregularly shaped bone that forms part of the vertebral column. Children have 33 vertebrae, 5 of which fuse in adults to form the sacrum and 4 to form the coccyx. There are 7 cervical vertebrae in the neck, 12 thoracic vertebrae in the thorax with the ribs attached, and 5 lumbar vertebrae in the lower back.



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? Mentioned in ? References in periodicals archive
 
Klippel-Feil syndrome (KFS) is a congenital fusion of the cervical vertebrae that may involve two segments: a congenital block vertebra, or the entire cervical spine.
 
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