Schizencephaly

Schizencephaly is a rare congenital brain malformation characterized by abnormal clefts (splits) lined with gray matter that extend from the surface of the cerebral cortex to the lateral ventricles. These clefts may be unilateral (affecting one side of the brain) or bilateral (affecting both sides) and are classified as either closed-lip (Type I), where the walls of the cleft are in contact with each other, or open-lip (Type II), where the cleft walls are separated and filled with cerebrospinal fluid. The condition results from a disruption in early brain development during neuronal migration, typically occurring between the second and fifth months of gestation. The clinical presentation of schizencephaly varies widely depending on the size, location, and type of the cleft(s). Common symptoms include seizures (epilepsy), motor impairment ranging from mild weakness (hemiparesis) to severe spastic quadriparesis, intellectual disability, and developmental delays in speech and language. Individuals with bilateral open-lip clefts tend to have more severe neurological deficits, while those with small unilateral closed-lip clefts may have milder symptoms, sometimes presenting only with seizures or mild motor difficulties. Hydrocephalus (excess fluid in the brain) may also occur, particularly in open-lip cases. Microcephaly is another associated finding. Most cases of schizencephaly occur sporadically, though mutations in the EMX2 gene have been identified in some familial cases. Environmental factors such as prenatal infections (particularly cytomegalovirus), vascular disruptions, and exposure to teratogens have also been implicated. There is no cure for schizencephaly, and treatment is supportive and symptomatic. Management may include antiepileptic medications for seizure control, physical and occupational therapy for motor impairments, speech therapy for language delays, and in some cases, surgical placement of a shunt to manage hydrocephalus. Prognosis depends on the severity of the malformation and associated complications.

Common questions about Schizencephaly