Cerebral cortical dysplasia

Cerebral cortical dysplasia (also referred to as focal cortical dysplasia or cortical malformation) is a rare congenital brain malformation characterized by abnormal development of the cerebral cortex, the outer layer of the brain responsible for higher cognitive functions, motor control, and sensory processing. The condition arises from disrupted neuronal migration and organization during fetal brain development, leading to areas of abnormally structured cortical tissue. These malformations primarily affect the central nervous system and can vary widely in extent and location within the brain. The hallmark clinical feature of cerebral cortical dysplasia is epilepsy, which is often drug-resistant and may present in infancy or childhood. Seizures can be focal or generalized depending on the location and extent of the cortical abnormality. Additional symptoms may include intellectual disability, developmental delay, motor impairment, and speech or language difficulties. The severity of symptoms is highly variable and correlates with the size, location, and type of cortical malformation present. Diagnosis is typically established through brain magnetic resonance imaging (MRI), which can reveal characteristic abnormalities such as cortical thickening, blurring of the gray-white matter junction, and abnormal gyral patterns. Electroencephalography (EEG) is used to characterize seizure activity. Treatment primarily focuses on seizure management with antiepileptic medications. In cases of medically refractory epilepsy, surgical resection of the dysplastic cortical area may be considered and can be curative in selected patients. Supportive therapies including physical therapy, occupational therapy, and speech therapy are important components of comprehensive management. Genetic counseling may be offered, as some forms of cortical dysplasia have been associated with mutations in genes involved in the mTOR signaling pathway.

Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.

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