Table 1.

Patient preoperative epilepsy syndrome, PMG characteristics, surgery description, and seizure control outcome

Pt	Age, sex	Age onset	Preop seizure type	PMG type and associated imaging findings	Epilepsy syndrome	Surgery performed	Engel
1	3 month, F	Birth	Focal dyscognitive	Multifocal left PMG of frontal pole, convexity and frontal and parietal opercula with transmantle cortical dysplasia and hemimegalencephaly	Not available	Left hemispherectomy	Ia
2	1 year, F	Birth	ES, focal motor	Diffuse left PMG with hemimegalencephaly, pachygyria and subependymal heterotopia	Focal refractory with ES, symptomatic of MCD	Left functional hemispherectomy	Ia
3	9 year, M	6 year	Focal motor and dyscognitive, SGTCS, SE, atypical absences, and ESES	Bilateral temporal occipital polymicrogyria, bilateral parietal and occipital while matter volume loss and thinning of the posterior corpus callosum	ESES	Right occipital seizure foci resection	Ia
4	34 year, M	26 year	Focal ± dyscognitive, motor or SGTCS	Right occipital polymicrogyria extending from occipital pole to calcarine sulcus and to posteromedial aspect of occipital horn of lateral ventricle	Focal refractory, symptomatic of MCD	Right occipital seizure foci resection	Ia
5	30 year, F	11 year	Focal ± dyscognitive, motor or SGTCS	Focal right perisylvian polymicrogyria with involvement of the frontal, parietal and temporal lobes	Not available	1. Right frontal seizure foci resection	Ic
						2. VNS
6	38 year, M	26 year	Focal dyscognitive ± SGTCS	Right temporal lobe polymicrogyria with cortical dysplasia	Focal refractory, symptomatic of MCD	Right frontoparietal and temporal seizure foci resection	Ic
7	36 year, F	Child hood	Focal dyscognitive with aphasia and motor symptoms ± SGTCS	Bilateral perisylvian polymicrogyria with left closed-lip schizencephaly	Focal refractory, symptomatic of MCD	Left frontotemporal seizure foci resection	IIc
8	4 month, M	4 month	Focal motor ± SGTCS	Focal right frontal polymicrogyria involving operculum, anterior insula, orbital gyri, reduced white matter volume	Focal refractory, symptomatic of MCD	1. Right frontal seizure foci resection	IIIa
						2. Right functional hemispherectomy
9	10 year, M	5 year	Focal sensory and motor ± SGTCS	Bilateral occipital lobe polymicrogyria with left parietal gross architectural distortion likely from in utero insult	Focal refractory, symptomatic of MCD	Left functional hemispherectomy	IIIa
10	44 year, F	18 year	Focal dyscognitive with aphasia ± SGTCS	Left greater than right bilateral posterior perisylvian polymicrogyria extending to parietal operculum	Focal refractory, symptomatic of MCD	Right anterior temporal, inferior frontal and parietal seizure foci resection	IIIa
11	2 year, M	2 month	ES, focal motor	Focal right perisylvian PMG and hemimegalencephaly	Focal refractory with ES, symptomatic of MCD	Right functional hemispherectomy	IVb
12	16 year, M	3.5 year	Focal motor ± dyscognitive, ±SGTCS	Focal left perisylvian polymicrogyria with left hippocampal atrophy and nodular heterotopia of the occipital horn	Focal refractory, symptomatic of MCD	Left superior temporal, peri-insula, and parietal seizure foci resection	IVb

PMG, polymicrogyria; FU, follow-up; SGTCS, secondary generalized tonic–clonic seizures; ES, epileptic spasm; SE, status epilepticus; ESES, electrical status epilepticus during sleep; MCD, malformation of cortical development; VNS, vagus nerve stimulator.