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myelomeningocele

Wednesday 12 January 2005

Definition: Type of spina bifida in which the spinal cord and the meninges protrude from an opening in the spine.

A myelomeningocele is the most common type of spina bifida and is characterized by herniation of the spinal cord, nerves, or both through a bony defect of the spine. Myelomeningoceles are usually open defects in which either meninges or neural tissue is exposed to the environment.

Localization

- lumbosacral meningocele
- lumbar meningocele
- thoracolumbar meningocele
- sacral meningocele
- panspinal meningocele
- occipital meningocele
- thoracic meningocele

Associations

- hydrocephalus
- Arnold-Chiari malformation type 2
- cloacal dysgenesis
- anomalies of neuronal migration

  • cerebral dysplasia
  • cerebellar dysplasia
  • polymicrogyria

- spinal cord malformations

  • syringomyelia
  • syringobulbia
  • hydromyelia
  • diastematomyelia
  • double or multiple central canal
  • diplomyylia
  • tethered cord

- triploidy
- trisomy 18
- caudal regression syndrome

  • TRAP syndrome (twin reversed arterial perfusion)

See also

- familial myelomeningocele
- lipomyelomeningocele

Portfolio

  • Club feet in a spina bifida with myelomeningocele (neonate)
  • Club feet in a spina bifida with myelomeningocele (neonate)