Periventricular heterotopia, mental retardation, and epilepsy associated with 5q14.3-q15 deletion

Abstract excerpt

BACKGROUND: Periventricular heterotopia (PH) is an etiologically heterogeneous disorder characterized by nodules of neurons ectopically placed along the lateral ventricles. Most affected patients have seizures and their cognitive level varies from normal to severely impaired. At present, two genes have been identified to cause PH when mutated. Mutations in FLNA (Xq28) and ARFGEF2 (20q13) are responsible for...

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