Pediatric Radiology > Neurological > Developmental Abnormalities > Abnormal Neuronal Migration

Abnormal Neuronal Migration

Heterotopias are an abnormality of neuronal migration characterized by arrest in migration of the neurons from the subependymal area to the cortex. Typically, heterotopias are associated with other migrational disorders such as schizencephaly, lissencephaly, or polymicrogyria. Patients typically present with focal seizures. The lesions image as gray matter in abnormal locations within the white matter.

Gray matter heterotopia associated with colpocephaly from agenesis of the corpus callosum.

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