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Morphometric changes after endoscopic third ventriculostomy: a pediatric-adult comparison.

Dimitrios Emmanouilidis1, Pawel Krukowski2, Witold Polanski3

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Pediatric patients show superior ventricular remodeling after endoscopic third ventriculostomy (ETV) compared to adults. This suggests better cerebrospinal fluid dynamics and potentially better long-term outcomes in children undergoing ETV for hydrocephalus.

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Diameter of third ventricleEvans’ indexMamillopontine distanceTriventricular hydrocephalus

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Area of Science:

  • Neurosurgery
  • Pediatric Neurosurgery
  • Neuroradiology

Background:

  • Endoscopic third ventriculostomy (ETV) is a key treatment for triventricular hydrocephalus (TVH).
  • Conditions treated include aqueductal stenosis (AqS), mass lesions, and longstanding overt ventriculomegaly of adults (LOVA).
  • Comparative morphometric analysis post-ETV between pediatric and adult populations is crucial for understanding treatment efficacy.

Purpose of the Study:

  • To compare the morphometric remodeling of ventricles on MRI after ETV in pediatric and adult patients.
  • To evaluate differences in ventricular size changes and cerebrospinal fluid (CSF) dynamics between age groups.

Main Methods:

  • Retrospective analysis of 67 patients with TVH or LOVA undergoing ETV.
  • Patients stratified into pediatric AqS, adult AqS, adult lesions, and adult LOVA groups.
  • Measurement of Mamillopontine distance (MPD), Evans' index (EI), and third ventricle diameter (D3V) pre- and post-operatively.

Main Results:

  • Pediatric patients with AqS showed significant improvements in MPD, EI, and D3V post-ETV.
  • Adults with AqS and lesions showed some improvements, but less pronounced than in children.
  • Adults with LOVA demonstrated no significant morphometric changes post-ETV; shunt placement was highest in this group.
  • Pediatric patients exhibited the most distinct and consistent ventricular remodeling.

Conclusions:

  • Children demonstrate more effective ventricular remodeling after ETV compared to adults.
  • Pediatric patients exhibit superior cerebrospinal fluid dynamic adaptation post-ETV.
  • These findings suggest potentially more favorable long-term outcomes for pediatric hydrocephalus treated with ETV.