Assessment of gray matter heterotopia by magnetic resonance imaging

Table 2 Data of 5 patients with subcortical heterotopia

Patient/sex/age (yr)	Seizure type	Developmental milestones	Neurological examination	EEG findings	MRI characteristics of heterotopia
1/M/27	Complex partial	Delayed motor	Left hemiparesis	Focal spikes, slow wave	Large, nodular mass at right fronto-parietal lobes, extends across midline and ACC
2/F/15	Mixed	Delayed walking	spasticity	Focal spikes, slow waves	Small, multiple nodular, right frontal and parietal lobes
3/F/9	General tonic-clonic	Delayed speech and motor	Right hemipariesis	Spike-wave	Small, multiple, nodular, left parietal and ACC
4/F/7	General tonic-clonic	Delayed speech and motor	Attention deficit, hyperactivity, bilateral spasticity	General spike-wave	Bilateral curvilinear
5/M/1	Mixed	Delayed walking	Hyperactive reflexes	General slow wave	Mixed nodular and curvilinear and distorted ventricles

M: Male; F: Female; EEG: Electroencephalography; MRI: Magnetic resonance imaging; ACC: Anterior corpus callosum.