Modified periinsular hemispherotomy: operative anatomy and technical nuances

Area of Science:

• Neurosurgery
• Pediatric Neurology
• Epileptology

Background:

• Surgical treatments for pediatric unilateral hemispheric epilepsy have evolved from extensive resections to less invasive disconnection procedures.
• Anatomical hemispherectomy carries risks like superficial siderosis and hydrocephalus, prompting the development of functional hemispherectomy and hemispherotomy.
• Hemispherotomy represents the least resective approach, focusing on disconnecting the epileptogenic hemisphere.

Purpose of the Study:

• To describe the operative anatomy and nuances of a modified hemispherotomy procedure.
• To provide detailed 2D illustrations derived from 3D models for surgical guidance.
• To enhance understanding of this technically demanding procedure for treating unilateral epileptogenic hemisphere dysfunction.

Main Methods:

• Utilized 3D graphic models to create 2D overlay illustrations of relevant operative anatomy.
• Focused on the anatomical details crucial for effective hemispheric disconnection.
• Presented a modified approach to hemispherotomy.

Main Results:

• Hemispherotomy demonstrates effectiveness in reducing seizure frequency.
• This procedure is associated with a lower risk of postoperative complications compared to previous surgical methods.
• The study provides detailed anatomical insights for performing hemispherotomy.

Conclusions:

• Hemispherotomy is an effective treatment for pediatric patients with unilateral epileptogenic hemisphere dysfunction.
• This technique offers a favorable risk-benefit profile by limiting potential complications.
• A thorough understanding of 3D cerebral anatomy is essential for successful hemispherotomy.