Anatomical variations of the floor of the third ventricle and their surgical implications for endoscopic third ventriculostomy

Abstract

Endoscopic third ventriculostomy (ETV) is an established treatment for obstructive hydrocephalus. Anatomical variations of the floor of the third ventricle (FTV) may significantly influence surgical safety and outcomes. We retrospectively reviewed 53 ETV procedures performed between July 2022 and December 2023. Anatomical variations of the FTV were identified in 11 patients (20.7%), including thinned, partially effaced, thickened or opaque, and ballooning or herniated floors. Recognition of these variations is essential for safe fenestration and optimal outcomes.