- anterior spina bifida +/- anterior meningocele
- can be part of the Alagille syndrome
- Jarcho-Levin syndrome
- VACTERL association
Widening of the affected vertebral body. The bodies above and below the butterfly vertebra adapt to the altered intervertebral discs on either side by showing concavities along the adjacent endplates.
Some bone bridging may occur across the defect which usually happens in the thoracic or lumbar segments of the spine.