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Updated: Dec 7, 2025
02:30
Endoscopic Approach for Colloid Cyst Resection
Published on: May 23, 2025
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Third Ventricle Cavernous Malformation and Obstructive Hydrocephalus Thought to Be a Colloid Cyst
Emily K Chapman1, Rui Feng1, Constantinos G Hadjipanayis2
1Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
World Neurosurgery
|October 3, 2020
Summary
A rare third ventricle cavernous malformation (CM) caused obstructive hydrocephalus. Neuroendoscopic septostomy successfully treated the condition, avoiding lesion resection and resulting in full patient recovery without deficits.
Area of Science:
- Neurosurgery
- Neurology
- Vascular Malformations
Background:
- Third ventricle cavernous malformations (CMs) causing obstructive hydrocephalus are rare and challenging to diagnose preoperatively.
- These lesions can mimic other intraventricular pathologies like colloid cysts on imaging.
- Management strategies for CMs with obstructive hydrocephalus are varied.
Observation:
- A 78-year-old woman presented with balance issues, incontinence, and severe headaches.
- Brain imaging revealed obstructive hydrocephalus due to a third ventricle lesion, initially suspected as a colloid cyst.
- Neuroendoscopic visualization confirmed a third ventricle CM.
Findings:
- A neuroendoscopic septal pellucidum fenestration was performed to alleviate obstructive hydrocephalus.
- The cavernous malformation was not resected.
- The patient experienced a good recovery with no neurological deficits.
Implications:
- Neuroendoscopic septostomy is a viable treatment for obstructive hydrocephalus secondary to third ventricle CMs.
- This approach avoids direct resection of the CM, minimizing surgical risks.
- Successful management can lead to complete neurological recovery.
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