[Unilateral heterotropia of the cerebral cortex].

The case of a slight epileptic 30-year-old woman with heterotopic gray matter diagnosed by TC and NMR is described. The seizures of left jacksonian type begun at the age of 3, and stopped at the age of 12. In 1986 the seizures of atonic-akinetic type reappeared and continued until now at an average of 2 for year without obstacle for her job of employer. Cerebral computed tomography and magnetic resonance imaging showed a neuronal migration anomaly with nodular masses of gray matter in the right temporo-parietal area, characteristic image of gray matter heterotopia.