Changes in third ventricular size in pediatric patients undergoing endoscopic third ventriculostomy

Area of Science:

• Neurosurgery
• Pediatric Neurosurgery
• Neuroradiology

Background:

• Endoscopic third ventriculostomy (ETV) is a common treatment for pediatric hydrocephalus.
• Optimal methods for evaluating radiographic outcomes post-ETV are not well-established.
• Radiographic parameters require standardization for assessing ETV efficacy.

Purpose of the Study:

• To analyze imaging parameters, specifically third ventricular width and cross-sectional area (CSA), in pediatric patients following ETV.
• To determine if third ventricular dimensions are more sensitive indicators of ETV success compared to lateral ventricular measurements.
• To establish optimal radiographic evaluation methods for post-ETV outcomes.

Main Methods:

• Retrospective review of pediatric hydrocephalic patients who underwent ETV between 2004 and 2011.
• Stratification of patients into successful and unsuccessful ETV outcome groups based on clinical assessment.
• Measurement of pre- and post-operative third ventricular width and mid-sagittal CSA, alongside lateral ventricular parameters.

Main Results:

• Successful ETV cases showed a significant average decline in third ventricular width (0.32 cm, 17.4%) and CSA (1.85 cm², 19.7%).
• Unsuccessful ETV cases demonstrated a significant average increase in third ventricular width (0.35 cm, 21.0%) and CSA (1.17 cm², 17.3%).
• Lateral ventricular size changes were observed but were less pronounced than third ventricular parameter changes.

Conclusions:

• Third ventricular imaging parameters (width and mid-sagittal CSA) are more sensitive to ETV outcomes in pediatric hydrocephalus.
• These specific third ventricular measurements offer a more reliable assessment of ETV success.
• Standardizing the evaluation of third ventricular dimensions can improve post-ETV radiographic assessment.