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[Chiari "malformation" in Crouzon syndrome]

G Cinalli1, D Renier, G Sebag

  • 1Service de neurochirurgie pédiatrique, Université René-Descartes Paris V., France.

Archives De Pediatrie : Organe Officiel De La Societe Francaise De Pediatrie
|May 1, 1996
PubMed
Summary

Crouzon syndrome is frequently associated with Chiari malformation due to premature lambdoid suture closure. This study clarifies the incidence and reasons for this Chiari malformation link.

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Area of Science:

  • Neurosurgery
  • Pediatric Neurosurgery
  • Craniofacial Surgery

Background:

  • Chiari malformation and craniofacial synostosis association is more common than previously thought.
  • Crouzon syndrome, a type of craniofacial synostosis, presents unique challenges in understanding associated central nervous system (CNS) malformations.

Purpose of the Study:

  • To determine the actual incidence of Chiari malformation in patients with Crouzon syndrome.
  • To investigate the underlying reasons for the co-occurrence of bone pathology (craniofacial synostosis) and CNS malformation (Chiari malformation).

Main Methods:

  • Retrospective analysis of magnetic resonance imaging (MRI) scans.
  • Studied the posterior cranial fossa anatomy in 49 patients diagnosed with Crouzon syndrome.

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Main Results:

  • Chronic tonsillar herniation, characteristic of Chiari malformation, was detected in 71.4% of patients.
  • A higher incidence of Chiari malformation was observed in patients with Crouzon syndrome and hydrocephalus.
  • Premature lambdoid suture closure was significantly more common in patients with Chiari malformation.

Conclusions:

  • The frequent occurrence of Chiari malformation in Crouzon syndrome appears linked to the premature fusion of the lambdoid suture.
  • Understanding this association is crucial for managing patients with Crouzon syndrome and associated neurological conditions.