Resective surgery for hypothalamic hamartoma.

Area of Science:

• Neurology
• Neurosurgery
• Pediatric Endocrinology

Background:

• Hypothalamic hamartoma (HH) is a rare congenital brain malformation.
• HH can manifest as precocious puberty, epilepsy (including gelastic seizures), developmental delay, and behavioral disorders.
• Two distinct epileptic syndromes associated with HH exist, differing in age of onset and severity.

Purpose of the Study:

• To review the clinical presentation and diagnostic imaging of hypothalamic hamartoma.
• To evaluate the efficacy and safety of various surgical interventions for HH.
• To compare different surgical approaches, including resection and disconnection procedures.

Main Methods:

• Review of magnetic resonance imaging (MRI) for lesion identification and anatomical detail.
• Analysis of surgical outcomes for three main approaches: lateral pterional, midline frontal, and transcallosal interforniceal.
• Evaluation of disconnection procedures and alternative treatments like radiosurgery and radiofrequency ablation.

Main Results:

• The transcallosal interforniceal approach demonstrated the highest success rate, achieving seizure freedom in 69% of patients.
• Complication rates were similar across approaches (approx. 24%), but the transcallosal route resulted in milder complications and fewer neurological deficits.
• Disconnection procedures and alternative therapies offer additional treatment options.

Conclusions:

• The transcallosal interforniceal approach is the most effective surgical strategy for achieving seizure control in hypothalamic hamartoma.
• Surgical intervention for HH, while carrying risks, can significantly improve patient outcomes.
• A multidisciplinary approach considering surgical and non-surgical options is crucial for managing HH.