Subchoroidal approach to the third ventricle. Microsurgical anatomy

Area of Science:

• Neurosurgery
• Neuroanatomy

Background:

• The third ventricle is a midline cerebrospinal fluid-filled space.
• Accessing the third ventricle is crucial for treating various neurological conditions.

Purpose of the Study:

• To describe the surgical maneuvers for accessing the third ventricle.
• To identify key anatomical landmarks for safe surgical entry.

Main Methods:

• Surgical division of the ependyma near the choroid plexus.
• Separation of leptomeningeal bundles within the tela chorioidea.
• Division of the third ventricle roof along the stria medullaris.

Main Results:

• Key landmarks include the thalamostriate vein and direct lateral vein.
• The third ventricle is visualized through the roof opening and foramen of Monro.
• Wider exposure is achievable by transecting the thalamostriate vein.

Conclusions:

• The described maneuvers provide a reliable method for third ventricle surgical access.
• Precise identification of anatomical landmarks ensures procedural safety and efficacy.