Table 1.

Demographic and clinical data of all patients with hemispherectomy

Patients	Gender	Age at study (years)	Age at surgery (years)	Time since surgery (years)	Diagnosis	Etiology group
1	M	8.1	5.9	2.2	HME left	congenital
2	M	3.3	1.1	2.2	HME left	congenital
3	M	14.8	3.7	11.1	Cortical dysplasia right*	congenital
4	M	2.2	0.9	1.3	HME left	congenital
5	F	2.7	2.7	0.02	Cortical dysplasia right*	congenital
6	M	12.9	5.7	7.2	Cortical dysplasia left*	congenital
7	F	11.5	6.9	4.6	Cortical dysplasia right*	congenital
8	F	0.9	0.8	0.1	HME left	congenital
9	M	14.0	2.3	11.7	Prenatal stroke right	congenital
10	F	8.9	4.1	4.8	Prenatal stroke left	congenital
11	F	20.5	2.5	18.0	Prenatal stroke right	congenital
12	F	8.7	2.2	6.5	Rasmussen right	acquired
13	F	3.9	3.1	0.8	Rasmussen left	acquired
14	F	18.1	9.8	8.3	Rasmussen right	acquired
15	F	15.2	3.8	11.4	Rasmussen right	acquired
16	F	12.2	4.1	8.1	Rasmussen right	acquired
17	F	25.0	12.9	12.1	Rasmussen right	acquired
18	F	20.7	4.4	16.3	Postnatal stroke right	acquired
19	F	14.5	5.7	8.8	Postnatal stroke right	acquired

F, female; HME, hemimegalencephaly; M, male;

^*, includes an extensive unilateral malformation of cortical development affecting more than one cerebral lobe requiring full anatomical hemispherectomy rather than a more conservative neurosurgical approach.