Block vertebra

Block vertebra is a type of vertebral anomaly where there is a failure of separation of two or more adjacent vertebral bodies. It is an anatomic variant.

Pathology

In a block vertebra, there is partial or complete fusion of adjacent vertebral bodies.

Associations

Radiographic features

  • combined vertebrae may be of normal height, short, or tall
  • disc space is frequently rudimentary or absent
  • the "wasp-waist sign" may be seen in congenital block vertebrae 4
Anatomy: Spine
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Article information

rID: 14807
Section: Anatomy
Synonyms or Alternate Spellings:
  • Block vertebrae

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Cases and figures

  • Case 1
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  • Case 2
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  •  Case 3
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  • Case 4: with spinal cord malformation
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  • Case 5: at C2-C3 level
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  • Case 6
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  • Case 7
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  • Case 8
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