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Modified functional hemispherectomy in hemimegalencephaly.

H Yoshioka¹, K Hasegawa, T Sakamoto

¹Department of Pediatrics, Kyoto Prefectural University of Medicine, Japan.

Brain & Development

|April 17, 1999

Summary

This summary is machine-generated.

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A modified functional hemispherectomy successfully treated hemimegalencephaly in a child, preserving key brain regions. This surgical approach led to complete seizure cessation and discontinuation of anticonvulsant medication.

Area of Science:

Pediatric Neurology
Neurosurgery

Background:

Hemimegalencephaly is a rare congenital brain malformation characterized by unilateral enlargement of the cerebral hemisphere.
Epilepsy is a common and often intractable symptom associated with hemimegalencephaly, significantly impacting quality of life.

Observation:

A 13-month-old girl with hemimegalencephaly presented with medically refractory seizures.
A modified functional hemispherectomy was performed, involving medial temporal lobectomy with excision of the hippocampus and amygdala, while preserving the central parasagittal region.

Findings:

The patient experienced complete cessation of seizures within days of the surgical intervention.
Anticonvulsant medication was successfully withdrawn 5 months post-surgery.
The patient remained seizure-free for a follow-up period of 42 months.

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Implications:

Modified functional hemispherectomy represents a viable and effective surgical strategy for managing intractable epilepsy in pediatric hemimegalencephaly.
Preservation of central brain regions during hemispherectomy may contribute to favorable neurological outcomes.
This case highlights the potential for significant seizure control and improved long-term prognosis in children with hemimegalencephaly treated with tailored surgical approaches.