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Related Experiment Videos

Chiari malformation in craniosynostosis.

Giuseppe Cinalli1, Pietro Spennato, Christian Sainte-Rose

  • 1Department of Pediatric Neurosurgery, Santobono-Pausilipon Children's Hospital, Naples, Italy. giuseppe.cinalli@fastwebnet.it

Child'S Nervous System : Chns : Official Journal of the International Society for Pediatric Neurosurgery
|May 6, 2005
PubMed
Summary

Chiari malformation (CM) is often found in syndromic craniosynostosis. It appears to be an acquired condition due to hindbrain growth disproportion and premature suture fusion, potentially treatable with posterior cranial vault expansion.

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Area of Science:

  • Neurosurgery
  • Pediatric Neurosurgery
  • Craniofacial Surgery

Background:

  • Chiari malformation (CM) is frequently observed in multisutural and syndromic craniosynostosis, affecting a significant percentage of patients with conditions like Crouzon's syndrome and Pfeiffer's syndrome.
  • The exact pathogenesis and optimal treatment strategies for CM in this context remain subjects of ongoing debate and research.

Observation:

  • CM in craniosynostosis is increasingly viewed as an acquired, progressive condition developing in early infancy.
  • This progression is linked to a growth imbalance between the hindbrain and a restricted posterior fossa, resulting from premature fusion of cranial sutures.

Findings:

  • Premature fusion of cranial vault and base sutures is a key factor in CM development.
  • Associated conditions include congenital anomalies of the cerebellum and brainstem, elevated intracranial pressure, venous hypertension, and hydrocephalus.

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  • Jugular foramen stenosis can contribute to venous hypertension, leading to intracranial hypertension and/or hydrocephalus.

    • Implications:

    • Careful MRI evaluation is crucial for high-risk craniosynostosis patients to detect hindbrain herniation.
    • Posterior cranial vault expansion is recommended as the primary surgical intervention.
    • Simultaneous occipital vault remodeling and suboccipital decompression can address both posterior cranial deformity and CM in select cases.