[Inter thalamo-trigonal approach to the third ventricle (author's transl)]

Area of Science:

• Neurosurgery
• Neuroanatomy
• Neurology

Context:

• Surgical approaches to the third ventricle present challenges due to surrounding critical neuroanatomical structures.
• Traditional methods may involve sectioning critical pathways, potentially leading to neurological deficits.

Purpose:

• To describe a surgical technique for accessing third ventricle lesions that avoids sectioning the anterior columns of the trigonum.
• To evaluate the advantages of this approach, focusing on minimizing neurological deficits and improving surgical access.

Summary:

• Exploration and surgical treatment of third ventricle lesions can be achieved without sectioning the anterior columns of the trigonum.
• The approach involves lifting the body of the trigonum and choroid tissue, sometimes requiring only sectioning of the thalamostriated vein.
• This method provides significantly wider surgical access, particularly to the posterior aspect of the third ventricle.

Impact:

• The primary advantage is the absence of memory (mnesic) impairment, especially in cases of benign third ventricle tumors.
• This technique enhances surgical maneuverability and potentially reduces the risk of postoperative cognitive deficits.
• Facilitates more comprehensive surgical treatment of third ventricle pathologies.