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Related Experiment Videos

MR venography in children with complex craniosynostosis.

N Rollins1, T Booth, K Shapiro

  • 1Department of Radiology, University of Texas Southwestern Medical Center and Children's Medical Center, Dallas, Tex 75235, USA. nrolli@childmed.dallas.tx.us

Pediatric Neurosurgery
|September 6, 2000
PubMed
Summary

Jugular foramen stenosis may cause hydrocephalus in complex craniosynostosis. MR venography (MRV) revealed venous outflow obstruction in most patients, with posterior condylar veins compensating for blocked jugular veins.

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Area of Science:

  • Neurosurgery
  • Radiology
  • Pediatric Neurology

Background:

  • Complex craniosynostosis is associated with hydrocephalus and tonsillar herniation.
  • Jugular foramen stenosis is a proposed cause of venous hypertension in these patients.

Purpose of the Study:

  • To evaluate venous outflow obstruction using MR venography (MRV) in patients with complex craniosynostosis.
  • To investigate the relationship between venous outflow obstruction, hydrocephalus, and tonsillar herniation.

Main Methods:

  • Seventeen patients (4 months to 34 years) with complex craniosynostosis underwent MR imaging and axial 2D Time-of-Flight MRV.
  • Patterns of venous drainage, hydrocephalus, and tonsillar herniation were assessed.

Main Results:

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  • Jugular vein obstruction was identified in 12 out of 17 patients, particularly in syndromic and non-syndromic cases.
  • Posterior condylar veins were the primary collateral drainage pathway.
  • Hydrocephalus was present in 75% of patients with abnormal MRV findings; tonsillar herniation was also frequently observed.

Conclusions:

  • Posterior condylar veins play a crucial role in venous drainage during jugular bulb occlusion.
  • While MRV can detect venous outflow obstruction, it may not always indicate significant intracranial venous hypertension.