Interhemispheric Transcallosal Interforniceal Approach for Retroforaminal Colloid Cysts of the Third Ventricle:...

Area of Science:

• Neurosurgery
• Neurology
• Surgical Oncology

Background:

• Colloid cysts are benign intracranial tumors that pose surgical challenges due to their variable locations.
• These tumors can displace critical neuroanatomical structures like the fornices and internal cerebral veins.
• Various surgical approaches exist, each with specific anatomical considerations and potential drawbacks.

Purpose of the Study:

• To present a technical note on managing posteriorly located colloid cysts of the third ventricle.
• To highlight key nuances of the interhemispheric transcallosal interforniceal approach for colloid cyst resection.
• To provide a step-by-step description and accompanying surgical video of the technique.

Main Methods:

• Retrospective review of colloid cyst cases treated at the institution.
• Selection of cases managed via the interhemispheric transcallosal interforniceal surgical route.
• Detailed description of the surgical technique applied to four specific cases.

Main Results:

• Four cases of colloid cysts treated with the interhemispheric transcallosal interforniceal approach are presented.
• Cases included asymptomatic cysts with hydrocephalus risk, a recurrent cyst after endoscopic surgery, and a cyst with shunt history.
• The approach was associated with safe and effective resection, with no reported cognitive worsening in the recurrent case and no complications in the fourth case.

Conclusions:

• The interhemispheric transcallosal interforniceal approach is a valuable surgical option for colloid cysts posterior to the foramen of Monro.
• This technique allows for safe and effective tumor resection.
• Preservation of cognitive function is a key benefit of this surgical corridor.