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What is Endoscopic Third Ventriculostomy (ETV)?

Endoscopic Third Ventriculostomy (ETV) is a one-time procedure; an opening is created in the floor of the third ventricle using an endoscope placed within the ventricular system through a burr hole. This allows the movement of cerebrospinal fluid (CSF) out of the blocked ventricular system and into the interpenducular cistern (a normal CSF space) thereby shortcutting any obstruction. ETV is used to treat certain forms of obstructive Hydrocephalus, such as aqueductal stenosis.