[Convulsive seizures and heterotopic gray matter; report of two cases].

We reported CT and MRI findings of heterotopic gray matter in two patients with intractable convulsive seizures. CT demonstrated space-occupying but non-expansive lesions isodense with the cortical gray matter adjacent to the body of the lateral ventricle. These lesions were not enhanced with contrast infusion. MRI was performed in one case in which the lesion was isointense with the cortical gray matter.