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Author Spotlight: A Single-Entry Point Endoscopic Intraventricular Approach for Third Ventriculostomy and Pineal Biopsy
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Interhypothalamic adhesions in endoscopic third ventriculostomy.

David Phillips1,2, David A Steven3, Patrick J McDonald4

  • 1Division of Neurosurgery, Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada. dave.phillips.work@gmail.com.

Child'S Nervous System : Chns : Official Journal of the International Society for Pediatric Neurosurgery
|June 8, 2019
PubMed
Summary
This summary is machine-generated.

Interhypothalamic adhesions (IHAs) are rare bands of tissue that can obstruct access during endoscopic third ventriculotomy (ETV). Recognizing and managing these adhesions is crucial for surgical success and avoiding hypothalamic injury.

Keywords:
Hypothalamic adhesionIntrahypothalamic adhesionPrimary agenesis of the septum pellucidumThird ventricle anatomy

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Area of Science:

  • Neurosurgery
  • Neuroanatomy
  • Medical Imaging

Background:

  • Interhypothalamic adhesions (IHAs) are rare gray matter-like bands traversing the third ventricle.
  • These anomalies can be incidentally detected via MRI or during endoscopic ventricular surgery.

Purpose of the Study:

  • To analyze the characteristics and surgical implications of interhypothalamic adhesions (IHAs) encountered during endoscopic third ventriculotomy (ETV).

Main Methods:

  • Retrospective review of four cases of IHAs identified during ETV at two institutions.
  • Analysis included chart reviews, imaging, and intraoperative videos/photos to assess IHA size, location, multiplicity, and associated anomalies.

Main Results:

  • Four IHAs were identified, partially or completely obscuring third ventricular floor access.
  • IHAs were duplicated in two patients, large (>3 mm) and obstructing in three, and adherent to the floor in three.
  • All four patients had primary absence of the septum pellucidum; surgery was affected in three cases, requiring IHA management.

Conclusions:

  • Interhypothalamic adhesions (IHAs) are rare but can significantly hinder ETV by obstructing access or misdirecting the ventriculostomy.
  • Management options include aborting, re-siting, retracting, or dividing the IHA, enabling successful ETV in most cases.
  • Despite potential surgical challenges, no postoperative pituitary or hypothalamic dysfunction was observed in this cohort.