Clinical Scorecard: Laser Interstitial Thermal Therapy Guided by MRI for Epilepsy: Techniques, Indications, and Outcomes in Adults Based on a Single-Center Study

At a Glance

Key Highlights

• MRIgLITT enables precise, minimally invasive ablation of epileptogenic lesions with millimeter accuracy and real-time thermal monitoring.
• Indications include well-localized epileptogenic foci confirmed by concordant semiology, EEG, MRI, cognitive and functional studies.
• Advantages include avoidance of craniotomy, treatment of deep or eloquent area lesions, rapid recovery, and cognitive function preservation.

Guideline-Based Recommendations

Diagnosis

• Comprehensive presurgical evaluation including 3T MRI, video EEG, neuropsychological testing, and additional imaging (SPECT, PET, fMRI) as needed.
• Multidisciplinary committee review to confirm concordance of seizure semiology, EEG onset, MRI findings, and cognitive profile before MRIgLITT indication.

Management

• Use MRIgLITT primarily for dominant hemisphere temporal lobe epilepsy with hippocampal sclerosis to minimize cognitive impairment.
• Select MRIgLITT as first-line surgical treatment for hypothalamic hamartoma and for lesions difficult to access by open surgery.
• Standardize surgical protocols tailored to pathology (HS, HH, FCD, PVH, tumors) including catheter type, target and safety points.

Monitoring & Follow-up

• Continuous intraoperative MRI thermometry to monitor temperature and estimate irreversible tissue damage.
• Postoperative seizure outcomes assessed by Engel Scale at multiple time points (3 months, 6 months, 1 year, 3 years).
• Neuropsychological reassessment at 3 and 12 months post-surgery using Reliable Change Index to detect cognitive changes.

Risks

• Potential complications related to thermal damage near critical structures; safety points and trajectory planning essential to minimize risks.
• Unclear clinico-radiological predictors of outcomes necessitate further standardization and prospective studies.

Patient & Prescribing Data

Adults with drug-resistant focal epilepsy undergoing MRIgLITT at a single epilepsy center

MRIgLITT is effective for seizure control with cognitive preservation, especially in dominant temporal lobe epilepsy and hypothalamic hamartoma; treatment decisions guided by multidisciplinary evaluation and tailored surgical protocols.

Clinical Best Practices

• Perform thorough multidisciplinary presurgical evaluation to ensure concordant localization of epileptogenic focus.
• Customize MRIgLITT protocols by epilepsy pathology to optimize catheter placement, ablation parameters, and safety margins.
• Use real-time MRI thermometry and software modeling to precisely control ablation extent and protect adjacent eloquent tissue.
• Implement standardized neuropsychological assessments pre- and post-operatively to monitor cognitive outcomes.
• Reserve MRIgLITT for lesions inaccessible or high-risk for open surgery and for patients prioritizing minimally invasive options.

References

• Engel Scale for seizure outcome assessment
• Reliable Change Index for cognitive assessment
• MRIgLITT technique and thermometry principles
• Minimally invasive epilepsy surgery overview