Quantitative ventricular volume changes after endoscopic third ventriculostomy in children with Dandy-Walker...

Area of Science:

• Pediatric Neurosurgery
• Medical Imaging
• Congenital Malformations

Background:

• Hydrocephalus is common in Dandy-Walker malformation (DWM), affecting up to 80% of cases.
• Endoscopic third ventriculostomy (ETV) is a primary treatment, but data on volumetric changes are limited.

Purpose of the Study:

• To evaluate volumetric changes in the brain's ventricles and posterior fossa cyst after ETV in DWM patients.
• To correlate these volumetric changes with clinical outcomes.

Main Methods:

• Retrospective analysis of pediatric DWM patients who underwent primary ETV for hydrocephalus.
• Preoperative and postoperative MRI scans analyzed using semiautomated volumetry to measure ventricular and cyst volumes.
• Assessment of clinical improvement, stoma patency, and need for re-intervention.

Main Results:

• ETV demonstrated a 66.7% success rate in treating hydrocephalus in DWM patients.
• Significant reduction in supratentorial ventricular volume (25.2%) and posterior fossa cyst volume (19.2%) observed post-ETV.
• Ventricular volume reduction correlated with improved clinical outcomes, while cyst volume reduction did not consistently predict success.

Conclusions:

• ETV is an effective shunt-free treatment for hydrocephalus in most DWM patients.
• Supratentorial ventricular volume reduction is a key indicator of ETV success.
• Posterior fossa cyst regression is variable and not essential for favorable clinical outcomes.