Table 1.

Characteristics of insular patients

Pt.	Age at first seizures (yrs)	Age at surgery (yrs)	Time since surgery (yrs)	Pre-surgery MRI	Resection			Engel et al.’s (1993) classification of outcome
					Side	Insular area	Other areas
I1	31	47	1.1	Normal	L	Posterior	Temporo-parietal opercula	Class I
I2	5	23	0.6	R insular tuber	R	Complete	Fronto-parieto-temporal opercula	Class I
I3	5	38	0.5	Normal	L	Anterior	Temporal operculum	Class I
I4	21	36	0.4	Normal	R	Posterior	Parieto-temporal opercula	Class II
I5	30	35	2.7	Normal	L	Anterior		Class II
I6	26	36	1.6	Normal	R	Anterior–superior	Frontal opercula	Class I
I7	9	27	1.6	Normal	R	Anterior	Orbitofrontal operculum	Class I
I8	33	39	4.0	Normal	L	Anterior	Temporal operculum	Class III
I9	0	32	0.5	Possible subtle R operculo-insular CD	R	Posterior	Parietal operculum, inferior post-central gyrus	Class I
I10	31	34	8.8	Normal	L	Posterior		Class I
I11	4	38	6.7	R insular CD	R	Complete	Fronto-parietal opercula	Class I
I12	13	49	0.5	Normal	R	Superior	Frontal operculum	Class I
I13	4	34	0.5	L insular CD	L	Superior	Frontal operculum	Class I

CD, cortical dysplasia; HS, hippocampal sclerosis; L, left; R, right.