MRI-guided stereotactic radiofrequency thermocoagulation for 100 hypothalamic hamartomas

Area of Science:

• Neurosurgery
• Neurology
• Medical Imaging

Background:

• Hypothalamic hamartoma (HH) is a rare congenital brain malformation often associated with intractable epilepsy, particularly gelastic seizures (GS).
• Conventional treatments for HH-related epilepsy have limitations, necessitating exploration of less invasive and more effective surgical options.

Purpose of the Study:

• To evaluate the invasiveness, effectiveness, and feasibility of Magnetic Resonance Imaging (MRI)-guided stereotactic radiofrequency thermocoagulation (SRT) for treating hypothalamic hamartoma (HH).
• To assess seizure control, comorbidities, and long-term outcomes in patients with HH undergoing SRT.

Main Methods:

• A retrospective analysis of 100 consecutive patients with intractable gelastic seizures (GS) due to HH who underwent SRT between 1997 and 2013.
• Data collected included patient demographics, seizure types, HH characteristics, comorbidities, procedural details, and follow-up outcomes (median 3 years).

Main Results:

• MRI-guided SRT was performed in 140 procedures across 100 patients, with no adaptive restrictions based on HH size or subtype.
• Freedom from GS was achieved in 86.0% of patients, 78.9% achieved freedom from other seizure types, and 71.0% were seizure-free overall.
• Significant improvements in behavioral disorders and intellectual function were observed following seizure freedom. Transient hypothalamic symptoms and some delayed comorbidities were noted.

Conclusions:

• MRI-guided SRT is a minimally invasive, highly effective, and feasible surgical option for all forms of epileptogenic HH, regardless of tumor size or patient comorbidities.
• The procedure demonstrates excellent long-term seizure control and can lead to substantial improvements in quality of life, including cognitive and behavioral aspects.
• SRT should be strongly considered as an early treatment option for patients experiencing gelastic seizures due to hypothalamic hamartoma.