Hemimegalencephaly: diagnosis and treatment

Area of Science:

• Neurology
• Developmental Neuroscience
• Pediatric Neurology

Background:

• Hemimegalencephaly is a congenital brain malformation characterized by unilateral or generalized enlargement of one cerebral hemisphere.
• This condition often presents with severe neurological symptoms, including intractable epilepsy and developmental deficits.

Observation:

• Report details three male patients diagnosed with hemimegalencephaly.
• Clinical presentations included neonatal convulsions and later-onset seizures, with abnormal electroencephalogram (EEG) findings showing spike and wave activity.
• Associated features observed were macrocephaly, hemiparesis, facial hemihypertrophy, and linear nevus.

Findings:

• Hemimegalencephaly diagnosis is supported by cranial ultrasonography findings.
• Patients exhibited significant developmental delay alongside epilepsy and other neurological manifestations.
• Seizure activity in these cases showed potential responsiveness to benzodiazepine therapy.

Implications:

• Highlights the importance of early neuroimaging for diagnosing hemimegalencephaly.
• Suggests benzodiazepines as a potential therapeutic option for managing seizures associated with this condition.
• Emphasizes the complex neurodevelopmental challenges faced by affected individuals, necessitating comprehensive care strategies.